He already did Bill and you helped. For four long years we put up with his antics and he’s trying for another four (or more.) And Bill Barr as much as anyone in the whole GOP establishment helped him do it. The way he handled the Mueller Report and the various cases against Trump associates showed him to be a top henchman and accomplice.
He’s right, of course. But most of us have known that from the beginning. Barr thought he could use him to advance his own pet causes so he was willing to put with it. Then he lost and staged a coup and Barr said to himself, “Huh, maybe I should desert this sinking ship before I go down with it.” He has a whole lot to answer for and just stating the obvious isn’t going to do it.