The problem I see with the typical Bush criticism is:
1. The President isn't working in a vacuum. He has a full branch of people that are helping him lead. You get the impression that most of his big decisions were made with a lot of input and involvement of his full cabinet. LBJ had the same issue with Vietnam, and it is a shame how that affects his legacy.
2. It's a hard job. I didn't vote for him twice, but I don't fault his intentions or work ethic.
Trump, on the other hand, seems to be playing a game and dismissing most anybody that isn't a yes man. That is bad.