I am no longer in college physics, dropped that shit! It was a piece of shit class with an ass hole of a teacher, filled with popular kids. Thank god I am no longer in it.
I would say that there are no horrible teachers. Just horrible kids they have to put up with that've worn them down. It's not the teachers fault if they have troubles...
...but then again, teachers still are mortal. So yeah. There are some absolutely horrible people out there being teachers.