Ughh. Saw this guy perform at a house show a few years back and he was a total mess. He drank all the liquor he could find, he was rude to the host, and then was rude to the other performers... blatantly telling them that what they were doing was "all wrong" in the middle of their set
Hopefully for his own sake he's cleaned up his act.
I hope so too. All my conversations with him have been pleasant, candid and polite. So to hear that is disheartening. Everyone has a bad night. Sorry you got such a weak performance.