It makes him seem like an inconsiderate jerk. Dan needs to think before he speaks, because not everything is comedy gold.
Just think, if this is how he behaves when he's "the new guy," how bad will he be once he's more comfortable with everything? It's going to be absolutely terrible having him berate the other members of Giant Bomb (or heaven forbid, their fans) on air like that.
I know Ryan had a reputation for that sort of thing, but I feel that he had a talent for always doing such "heel" things in good humour, which is something Dan is sorely lacking.
Honestly, at this moment, I'd rather subscribe to Giant BEast than Giant Bomb. Dan is certainly tilting the scale rather heavily. If the current Dan is the future of Giant Bomb, I'm out.
(Fortunately for GB, thanks to their fortuitous yearly sub sale, I'm locked in for the time being. Time to make amends, Dan.)