I don’t know whether Pete still operates but the guy is a nasty piece of work.
Shouts at students, and will go on and on about how bad they’re doing for ages, and this won’t be passive. It is full on unhealthy aggression. As a teacher (and as a person overall) you need to be aware that some people don’t react well to bullying, and especially when they’re paying for the pleasure.
I feel sorry for any other student who had to deal with this (which happens to be quite a few from my understanding).
I hope he is mentally in a better place now. What he was doing was unprofessional and sad.