I was a "teacher" for 6 years, I was lucky, I taught aircraft engineering to Royal Air Force apprentices at RAF Halton at HNC.
I taught "lads" who wanted to learn & of course I had a discipline system behind me to ensure control. Happy Years, but I could not do what you have been trying to do. Move on, take your skills to a place where they will be valued.
Godd luck.
Skipy