Both Bush presidents were disappointments.
Bush Sr. is said to have voted for Hillary, which alone defines him. (In his case, the nation had Bush fatigue after just one term)
Bush Jr. left office, with two wars unsettled, the finance/real estate crash on his watch, and turned the Presidency and both legislative chambers over to the dems. Once again Bush fatigue.
They both come from the weak-moderate party wing, the David Souter-Bill Kristol-John Kasich-lose with dignity wing. (Dole, McCain, Romney)
The majority of people on this site, seem to forget (or exist in perpetual denial) that Trump, warts and all, defeated his primary opponents, and the democrat challenger BECAUSE of Republican options like the Bushes.