My pick is Five Finger Death Punch and the obvious answer is Ivan Moody. The guy radiates that alpha-male wannabe energy and it definitely rings through all of the songs he has written and performed with this band. The guy is just a prick and a self-victimizing asshole.
I think he’s the primary reason FFDP is mocked so badly.
This one bums me out because Chad Smith is a great drummer and seems like such a a good dude.
Him and Flea sharked an MTV presenter during a live broadcast. They subsequently apologised but still, they ain’t exactly good people.