I hated my program, too. So, I left. It seems like a lot of people on this forum are ready to jump down your throat about classwork being irrelevant - but I'm sure quite a few of us have felt that way at some time or another. My program in particular didn't allow us to tailor our classes to represent what we'd be studying. We were all lumped into a group - so if you wanted to study cancer, you took cancer courses. Neuro, you took neuro courses. It makes it a bit frustrating when your focus is a little more interdiscplinary than that, and your stuck having to fight to get into classes that are "reserved" for people of a specific training group.
While I don't think that every class is worthless, I can fully empathize with you about wanting to just get into the lab and learn what you need to learn for your work. There are more ways to gain foundational knowledge than being stuck in a classroom and taking tests to determine how well you memorize information. Being able to ace coursework is only half the battle and a lot of classrooms these days don't necessarily allow students to engage in meaningful critical thinking - which is central to any discipline. Some people learn better in a classroom, others learn better as they actually practice the work. I'm a member of the latter group and found attendance in class to be frustrating. I don't know what your circumstances are. I don't know if your teachers are only teaching to fulfill a university requirement and therefore have no dedication to it (I've experienced this more times than I can count), I don't know if you're in a situation where you're better off just teaching yourself the material at home and reaching out to a prof when you have questions (also experienced this.). But, hopefully things will get better.
Everyone told me to stick with my program becuase "that's just how it [was] supposed to be during the first year." If you plan to stick it out, try to temper your unhappiness in the classroom with supplementary articles you find on your own. Talk to professors/PIs on a one on one basis about what you want to study and how you can make the classwork more relevant for yourself. At the very least, find a mentor.
On another note - we've all heard the reports and seen the statistics by now. The system may be "f*cked" as you say, and the market may be flooded with PhDs, etc. The only person you can worry about is yourself. What are you going to do to separate yourself from the masses? Sure, there are always plenty of people that apply for the same job, but someone has to get the position. Why couldn't or wouldn't it be you? As my boyfriend's father once said, "shovel enough sh*t and something is bound to stick."
I hope things get better for ya!