What did he do?
From my perspective, I'm not sure that he really is the most negative mediot on the scene, but he might be the worst in general. He's not interesting, or amusing, or likable at all. Over the last few years he's had several contrived moments where he starts screaming in a very Morton Downey jr-ish fashion.
This is pretty shallow, but once in a while on that 6:30 show they flashback to ten years ago for whatever (usually 'Sox WS), and '04 Tanguay is almost unrecognizable to the man on my TV screen now. I know it's common for people to age and gain weight over a ten year span, but good grief he seriously looks like a different person. Same voice though.
Yeah, he sucks.