Dickerson was actually pretty good at first, then he started to like himself a bit too much. From then on, he was on a mission to pick a player and trash him up and down, as well as continually hate on management. Doing this caused his ratings to soar, so he kept it up.
Bulldog was pretty good waaaay back when he was on WBEN. He's also pretty good when Schopp isn't on. Schopp drags him down, no doubt about it. I personally don't mind if they go off on occasional tangents, but they do so far too often.
As far as the general hating on the Bills, all I can say is that there hasn't been much positive to talk about over the last DECADE or so, so I can cut a little slack on that. After all, they have to talk about a generally crappy team daily from training camp until the season ends, and then around draft time. Until this year, they've also had to watch guys like Maybin, Whitner, and McCargo make up your first round picks. How positive can you be under those circumstances?