I used to listen to him, and he's always been brash but I didn't have any problems with him until he started attacking his producer on air a few years ago. Paraphrasing:

"Hey, producer. Bring my mic up. One more delay and you're out."

"That's it, you're fired. After this show don't come back. I don't put up with bullshit from anyone."

It didn't sound like he was joking. I don't know but it rubbed me the wrong way so I didn't listen after that.