Your description of your PhD program makes it sound quite unhealthy. There is a required course that students can only pass by cheating, the faculty have been apprised of this and that "only makes it worse"? Yikes. If the students don't care about academic integrity and the faculty don't care about the students, then things are dysfunctional to say the least.

It is not reasonable for one required course in a PhD program to take 40 hours a week of a student's time: that's a full work week. Spending that much time in the course in order to pass it doesn't make sense to me: something else will suffer in your program. (By the way, you say you also have a full time job, so that's another 40 hours a week. So you are spending 16 hours a day, Monday through Friday, on your job and this one class, and then whatever else you have to do for your PhD program gets done on the weekend? That's not being a hard worker. That is dangerously little down time. Putting yourself in that situation is a very poor investment for your own health, sanity and success.) To say that you can only pass the course by doing this much work sounds to me like saying you can't pass the course and that you must seek out another option. If you're not doing that because of "machismo": please be aware that that doesn't actually make any sense. Neither does a "refusal to fail": what you currently have is a plan that is very likely to lead to failure. Get a better plan.

I am very concerned that -- apparently, anyway -- everyone else is succeeding in the course by cheating. That's not acceptable. You say that it wouldn't help to point this out to the professor. Unless you have already personally contacted this professor about this issue, I don't see how you could know that. In my experience, the way that skullduggery like this gets perpetrated is because the people involved think they have "no choice". Of course you have a choice. I strongly recommend that you tell everything you've told us to the course instructor. Yes, there is the possibility that this could "make things worse". It could even jeopardize your future in the program. However, your future in your program is by no means secure at the moment, and if all your negative fears come to pass it does not sound like the program is worth your time.

If you approach the faculty with the attitude that the program has to be functional and ethical for you to stay in it, I find it very likely that they will work with you and help you through it. If they don't, then I think you're better off out of it. I realize that's a hard answer, but it's what I feel is the correct one.

Perhaps you should consider not trying to do all the problem sets.

If you only spent, say, 20 hours on each problem set, what would the consequences be? Maybe you could still complete 75% of the problems, and skip the most difficult or time-consuming ones. And maybe you'd still learn the material almost as well.

It sounds like you're not terribly concerned about the material in this class with regard to your research (though I would get a second opinion from your advisor on that - there could be connections that you simply don't know about). If so, then your motivation for taking the class is just because it's required. So try to estimate the minimum amount of work needed to pass the class, and make sure you're doing at least that much; but perhaps it's not worth it to push for a perfect grade.

In many graduate classes, one could skip a large fraction of the coursework and still get a grade of B. People will know you didn't do a great job in the class, but it won't get you kicked out of the program. And unlike the situation in undergrad programs, where every GPA point can seem critical in the race for grad school or a good job, in many contexts graduate GPA means practically nothing. People will look at your thesis, your papers, your advisor's opinion of your work - but your transcript gets only a cursory glance.

Given the difficult circumstances and the lack of other good options, I think this might be worth seriously considering. Of course you will have to set aside your "machismo and refusal to fail" - but these traits, taken to an extreme, can be a serious detriment to success in grad school, academic life, careers, etc. So you're going to want to learn how to temper them anyway, the sooner the better. Keep in mind that a B is not a failure; it's a strategic decision to prioritize other things. A good general doesn't try to win every battle; sometimes retreat is the best option in the long run.

Here's what you do. Ask the professor if this challenge is actually reasonable -- if it's some sort of final "trial by fire" strategy within the department. If so, ask him to state that. And then, as long as it is humanly possible (others have succeeded), you can simply put your nose to the grindstone and try to accomplish it.

Otherwise, it could be the department has slacked in evaluating student complaints. It might be an unreasonable request. Ask your Provost to investigate the matter. Burn-out is not an accomplishment for the department.

There's one possibility which hasn't been mentioned:

Perhaps this is the test of character?

I'd hunt down some prior students and find out what happened in that course. What did they (class members) do when they faced the fork in the road? (Cheat vs. Unfinished work) Even in 3rd person so they might be willing to share what others did (without betraying their own actions).

Are you willing to cheat and turn in complete solutions across the board? Or, are you willing to submit unfinished work, where you answer a reasonable number of them and present what direction you'd take with the remainder?

Jeśli uważasz, że rozmowa z instruktorem kursu nie pomoże, najpierw porozmawiaj ze swoim doradcą.

Jeśli jest to kurs, który wszyscy uczestnicy programu muszą wziąć, Twój doradca będzie miał już doświadczenie ze studentami walczący na tym kursie, mogą mieć rozwiązania, o których nawet nie wiemy, np pomocna książka, która wyjaśnia wszystko bardziej zwięźle, dzięki czemu nie musisz spędzać tyle czasu z podręcznikiem lub starszym uczniem, który z przyjemnością odpowie na niektóre z Twoich pytań.

Lub mogą porozmawiaj z instruktorem kursu o nakładzie pracy, który może okazać się lepszy niż studenci narzekający na obciążenie pracą (który - z punktu widzenia asystenta - zawsze robią, niezależnie od rzeczywistego obciążenia pracą).

Wiem powiedziałeś, że nie chcesz iść do swojego doradcy, ale to jest jedna z rzeczy, których musisz się nauczyć podczas takiego programu - kiedy poprosić o pomoc. Zaufaj mi, o ile nie jesteś na najwyższym szczeblu kariery, ważne jest, aby zgłaszać problemy na tyle wcześnie, aby Twój szef mógł coś z tym zrobić. Jeśli zaczekasz, aż wypalisz się, Twój doradca nie będzie w stanie doradzić Ci, jak tego uniknąć.

As you seem to have exhausted all natural support ideas that come to my mind (collaborating - particularly surprising that no one wants to, and not a good sign for your program's climate; seeking advice by TA and instructor), I don't see what else you could do but suffer through one harsh semester, and stick it out. Not working 90+ hours, instead trying to get more sleep, would almost certainly help; but saying this would be patronizing as you probably know it yourself.

Keep also in mind that in most fields, if your GPA is currently spotless, one poor grade in coursework should not matter at all.

If you are absolutely certain that every other student copies their solutions, you are put by their actions into competitive disadvantage, and a strongly unfair position. Your honest attempts are probably less good solutions than the accumulated-over-several-years answers of your classmates. You shouldn't be penalized for being the one honest student. As you don't want to make it known, it would be natural to thus think of getting a short-term fix by copying solutions too. I like to think though that producing less good homework on your own will pay off in the final where your hard work might be rewarded, and the others might find themselves at a loss as they merely copied solutions.

It boils down to sticking it out, unfortunately.

Good Ph.D. training requires that you are able to opening talk to your research advisor. You need to have this conversation, and explain your situation. I do not know of any graduate programs that will kick out for postponing your research in order to pass a class. I do know there are programs that will kick you out for poor grades, and programs that will not award you a degree if you do not take and pass a class.

Having said that, there are going to be inevitable delays in your Ph.D. research. This is going to be one of those delays. Your advisor's hands might be tied, but getting research done is probably very high on their priorities. If they receive government grants for research, then they most certainly need to maintain productively.

Simple put, you wont win if you fight the system. Focus on the class, and tell your advisor what you are doing and why you are not working on research. Nothing more that you can do. Your advisor will likely take up this issue with the director of the course or in the next department meeting. Finally, get all of the required (and only required) classwork out of the way before you start to get serious about research. At some point in the very near future, you should be able to teach yourself about any topic in your general field. That is one of those skills you should develop as a Ph.D. student, and as other have suggested, this might be testing that very ability.

It is important in life to know when it's time to go to the next level of the hierarchy (I miss the correct expression in English).

If the work is basically impossible to be completed without cheating, and without sacrificing everything else, you MUST report that to the head of department, to the boss of your professor.

In a job, in the future, will you always comply with directives from your boss, even when you are sure they are counterproductive? you must go to the higher level in the hierarchy and complain.

The same now.