Yeah all the time. Crappy bands come play at the bar. They sound just awful and unprofessional, and act the same. They crank their cheap amps way to loud for a tiny room, can't tune their $50 squires, swing the mics around denting the windscreens, start late and go 10 minutes over, take forever to load out, don't listen to a word I say then complain about how terrible the sound was.
There's lots of people out there who suck at life. This includes some sound engineers, musicians, and every other profession. It goes both ways.
clicky:
Bashing Sound Engineers...no longer allowed.
PS. This post wasn't directed at the OP personally, just been seeing a lot of this creeping up lately. It inevitably gets out of hand and that's why the rule was made. Just trying to nip it in the bud.