I started substituting last year towards the end of the school year in a relatively affluent district in Phoenix. I had to call security in a Biology class, I had three kids in the 6th grad say I threatened them (I had disciplined them by separating them. I was never asked my side of the story - just flat out banned from the school).
I had a 7th grader get in my face and threaten to kick my ass because I a toy he was playing with away from him during class and he wanted it back. I wouldn’t back down, so he ran out into the hall and kept screaming at me “good thing I’m in anger management, or I’d be beating your ass”, stuff like that. Luckily, the principal happened to hear a lot of what was going on and he was suspended for 10 days.
I think I’m sticking to the lower grades because they are a bit safer, maybe.
So many times, poor managers take action after hearing only one side of a story. You were lucky that time.