You got lucky.
I had an elementary school teacher place me in the lowest level reading group (with the sped kids) because I was bad at spelling. (I believe the offending word was Clavicle). Imagine her chagrin when I switched classes and ended up in the highest level reading group and in gifted and talented. Not technically “crazy” but a poor teacher.
In middle school our social studies teacher routinely let us run wild. At one point she actively encouraged the class to go out the window (we were on the first floor.) There was a rumor that she was hiding alcohol above the drop ceiling. I remember the door to her room being locked and when another teacher opened it she was standing on a chair, but that could be my imagination. After the school year was over parents made a big stink and she was replaced the next year.
In high school, where I generally had excellent teachers, I had a teacher that refused to teach freshmen Romeo and Juliet because “we wouldn’t” understand it. We were convinced that she was hungover all the time but who knows?