Yes, there are some bad and uncaring professors. Yes, there are some incompetent TAs. There are also wonderful examples of both. It happens.
Students have to be proactive, though. If you have a bad TA, change your section. If you have a bad professor, there are other ways to learn the material. If you don't understand, go talk to the professor or the TA, or another section's TA, or your friends who already took the class. Talk to your friends about the professors and whether they are any good before you take the class - in my experience, people's thoughts on this were usually right. Or, in some departments, read the student guides to the classes. If you aren't given reading assignments, for heaven's sake, look up the topic in your textbook, or, if there's no textbook (or an awful textbook) for the class, a textbook in one of the libraries.
MIT is not a good place for people who expect to be handed things. Students are expected to be very independent. There are plenty of resources and options if you go looking.
Back to the OP's question: OP, you're missing the point. Those sentiments - I Hate This F***ing Place and I Have Truly Found Paradise - coexist in each individual student. That's the point. It's not an issue of any given person feeling one or the other.
I have an old blog entry that's sort of about this:
MIT Admissions | Blog Entry: "I?TFP"
Suicide Prevention Days are a joke, by the way, not something really heavy.