The teachers at my school sometimes bullied the students. I wasn't one of them, but I can't imagine how horrible it must have been for those kids. They were targeted for their appearance and poor grades by kids and adults alike. Yeah, they were cringe kids whose moms dressed them and did their homework for them, but come on.

Anyway, bad (and abusive) teachers exist and it's not just an apathetic admin team that causes this issue. It's not always about liability or reputation, some adults are just awful to kids because their own lives suck and/or they get off on the power.