Way back at GA Southern, I got kicked out of a class for disagreeing with the professor. Never went back, took the F. Still had a 3.2.
I was pretty lucky in college. I really only had one prof that was any trouble. My English Lit 2 professor was a bitter old spinster who never missed an opportunity to assign us claptrap. Her opinions were fact, and we were “not seeing the big picture” if we disagreed. That sort of thing. It wasn’t until well after the course was completed that I discovered there was a “discrepancy” in scoring between males and females. I didn’t have an issue with my own grade (I wasn’t about to go out of my way for such a BS class), but several female students I knew all got higher grades for work that pretty clearly wasn’t deserving it.