Being a grad student here sucks. FML
Nah man, it's epic. I've had 4 awesome years of hanging out with undergrad friends and partying on the street/Dbar!
I think you're a rare exception.
The fact that I'm able to enjoy Princeton shows that it's possible for grad students to enjoy Princeton. Therefore, the problem is not with Princeton, but with grad students. Get out of your rooms, go party, have fun!