When Bush was president, many liberals disagreed with his policies and thought he wasn't an intellectual, but he received no where near the scorn that Trump does. Why? Because he was actually a decent human being who could string two sentences together who didn't take the office on the basis of such nationalist and partisan themes like "build that wall", "lock her up" while causally tossing about middle school insults. Trump is unique in just about everything he does, and while his base loves him, most of the country despises virtually everything about him.
And he's hijacked the entire conservative party so unfortunately conservatives are tied to him for the foreseeable future. It's almost impossible to separate conservatism in America with Trumpism these days.