Yeah, I've had my share of ones who've been outright abusive verbally to grossly incompetent. The verbally abusive ones, eh, I'm so used to that and once I started snarking back... well my grades fell fast, but my emotional well-being went up quite a bit.
I had one guy who would come in, set everyone work to turn in, collect their old stuff and leave after 5 minutes there. It was supposed to be a 2 hour (two classes back to back) basic class teaching accounting. Basic as in a 102 class. One day I decided, OK, if he can leave so can I, I'm gonna follow him and see where he goes. He left the class room, walked to the parking lot, went in his car and drove off campus. He was utterly incompetent, but at least it was a very honest way to be an exceptionally bad teacher. I went to the college counselor and told him I was not learning accounting unless the guy deign to teach it. He just looked at me and said "OK, lets find something else that can fill that requirement". Seems the guy was known for doing this, taking 15 minutes out of his real job at his accounting firm to collect our books, write 3 lines on the board and then go back to his real job.
Then I had my physics teacher. He'd spend 30 mins out of a 40 minute class laying on top of his desk talking about how AWESOME the last weekend's party they were all at was with the pretty girls on the front row. This guy had the audacity to accuse me of not paying attention in his class and being an unresponsive and difficult student. Well yes, by choice I wasn't out clubbing with the 18 year olds in my class like you were and that seems to be the brunt of your 'class'. I came to learn physics. Not find out how wasted you were. It became the only hard science class I flunked, that man could not explain physics to save his life. I wondered if he'd do better if he started using examples he understood like "when my bud drops this bottle of SoCo from the balcony 4 meters up cuz he's totally trashed here are the physics involved..", but he never seemed interested in connecting what he taught with the physics he was supposed to.