Really? I didn’t Leave ONE Game, Didn’t Teamkill anyone Excessively (Happened Once with a Grenade) and played for HOURS and then i log back in the play one game and get kicked out of it and was BANNED? Get your act together!
A few people have reported issues of banning on servers but you quoted " didn’t team kill anyone excessively" the system doesn’t just work on team killing the same person more than once, it works on over all team kills over a set amount if time.
You could have been reported by other players that you beat(or you were bad so you were reported for that) and the banhammer acted based on that. It’s automated.