I had the same problem in college. I majored in creative writing and it ruined it for me. There were so many 5 and 10 page papers to churn out by such and such a date. And then there were the nit-picking critiques. I ended up dropping writing and switching my two minors to majors (art and spanish). In a strange way, having two majors took the pressure off of me so I wasn't so extremely focused on one. (I think it was an issue of trying to be perfect at that one thing). I still experienced some of the same problems in art, but the students and profs were a little bit more mellow in the art department than they were in writing.

I decided to ride it out, regardless of how terrible I felt about my grades and how many mistakes I saw in my artwork. I resolved to let myself purposely make mistakes and embrace them, because in any form of art (writing, music, visual), those eccentricities are what make our styles unique. Happy accidents are the magic inside the creative process, which is something they forget to tell you at school. Once I began seeing myself that way, I started to enjoy what I was doing again. I'm even enjoying writing again.

My advice would be, if you're going to stick with music, do the work, BUT FORGET ABOUT THE GRADES/ OUTSIDE OPINIONS and embrace the experience... your experience. You don't have to like everything you're exposed to at school. It's ok to disagree with your profs and peers no matter what the "group think" is. Just see their opinions and advice as interesting and use what you think is good. Let change happen naturally. Also, you don't have to like what you're doing all the time. There are days when you'll be bored or fed up. That's a good day to do something else entirely or enjoy other people's works and get inspired by what you see/hear. The best advice I can give you is to in college is to slow down and let loose (a little).

But yes, I can totally relate to you. I'm still figuring out life myself but that much advice I can give.