Must say Physics, I love math and whatnot but the teacher ruined it for me. My lab partner dropped the course and I can't do 75% of the work on my own, and there was in his words "no other person to put me with. He never even tries. Even more so why I dislike physics is that I love math and decently enjoy science, even though I didn't particularly do well in it. Together through and I couldn't stand it, nothing seemed understandable because I either thought about the math perspective or science perspective but couldn't combine them to do any good. You never even use in the real world anyway, unless you become a physicist.