Champion RD92

Has anyone ever had a horrible teacher before? Like one who was either really bad at teaching, or was just a complete jerk? In high school, I had a physics teacher who literally didn't teach us at least half the stuff that was on the homework or tests, and then he yelled at the class for failing all the time. It was ridiculous. And all he did was screw around and talk to his student assistants and stuff, like he didn't even teach us stuff or help us when we needed help with something. Also, I had a computer teacher who was just a complete jerk to all the students. He would very rudely insult your work if it didn't meet his standards and he would be like "This is the best you can do?! This is terrible." So how about you guys, any experiences with bad teachers?