I can't think of another politician who fucked things up as badly as Trump did.
Now, I'll admit I voted for George W. Bush twice. And I wish I could honestly say that what turned me against him was blundering us into a war with Iraq or fouling up the response to Katrina. But I really didn't until he messed up the economy in 2008, and I found myself with an underwater mortgage, a busted 401K and a job that paid 25% less than what I had been making. In short, his incompetence affected me personally.
All that said, I think George is actually a decent guy. I can't say that for Trump, who seems to be a truly awful human being. Heck, even Tricky Dick has taken on a new luster compared to Trump. Nixon took accountability for his mistakes. So did Clinton, to a degree.