It's not what he's done, it's what he hasn't done. Bullpen specifically. Not to mention, and I'm sick of always discussing it, his track record on the "big trades" makes me wanna :puke. Some of his lesser deals have been quite good but it's the big ones (Wells, Ritchie, Botch) that everyone remembers and they have been HUGE flops.
FYI..... I was in favor of the Wells trade when it happened. Just didn't work out. One bad deal I can forgive, two I concede, and three..... you gotta go.