JD's massive decline, Sale getting re-injured, injuries to the starting staff and Casas going on the IL in WOO cannot be blamed on Bloom. Imho, his biggest error was obviously trading Renfro for JBJ. And as far as that Renfro trade blunder, I still believe Cora may have whispered in Bloom's ear to get JBJ back to Boston.
And as far as the Betts' trade is concerned; the SOX(JH) weren't going to pay Betts what he and his agent wanted, so for two months w/o Betts the SOX picked up a .290BA OF and, perhaps, their future starting catcher. I have no idea what the future holds for Downs.