Looking back (and to an extent during his Presidency) I see Bush as sort of the loyal "team player" who wanted to do right by his allies and his Elite circle of trust, which was the
Turd-blossom/Cheney/Rumsfeld/Wolfowitz wing of the Republican party at the time. I think he honestly believed that what these guys were telling him to do was the right thing. How bad he is for failing to recognize the errors of the policies and decisions these people wanted him to make is a different question. But I don't think he was an evil person necessarily, I think he was part of a larger machine and he was willing to use his position and power to do what his circle wanted. It didn't matter if they failed catastrophically, he would stick by them in his loyal frat-boy way. (E.g., Katrina.) This often made him look less than intelligent. (E.g., Katrina.) Bush certainly did not lack conviction and the ability to make decisions and stick to them though. It became a joke after he called himself "the decider" but he was, actually, precisely that. It's just that his decisions were often tragically wrong.