"I know what'll do it...we'll ostracize him and exclude him from the group!"
I had "teachers" like this. Their classes sucked so badly and were simultaneously easiest and most difficult. The difficult part was figuring out what they wanted regurgitated back to them and the format they were expecting. Learned flashlight communication from them and have spent most of the last 30 years unlearning that because it doesn't really get you anywhere or the answers you need.
I had similar shit happen. I just ignored them. When they tried to fail me for the class I went to another teacher that taught the same thing, gave them copies of my papers while I was sending them (over email) to the "administration" and CC'ed a few other people.
Yeah. That teacher did not last another year. I didn't give a fuck that they turned people against me. It just was more proof those people were pieces of shit that did not deserve the time of day.
Never thought I would post a "then everyone clapped" moment ever. Nope, I was hated even more for that. Fuck those people.