Bush was a colossal fuck-up who did way more material harm than Trump (so far, at least...) but I never really doubted that he cared and was trying to do the right thing. He was just massively, catastrophically wrong about what the right thing was. Bush was wrong, Trump is evil.
Bush will probably end up having dont more material wrong at the end of the day, but Trump is doing infinitely more moral damage to the fabric of the country. Whatever Bush's actions, there was real value in the fact that he still felt constrained to frame them all in terms of decency and liberal values. That we all had to at least act like there was some sense of morality that still mattered. Trump essentially gets up there every day and tells people that nothing matters and be as awful as you like.
That all said, it's hard to compare the moral damage done at home with the mortal catastrophe Trump wrought abroad. It's complicated. Trump personally repulses me more than Bush by orders of magnitude, but there's also part of me that feels like that's short-sighted towards the real harm.