Liberals hate Trump because he exposes the rotten aspects of a system and order that they were comfortable with before.
He makes them uncomfortable. He disturbs their peace. He makes it harder for them to ignore contradictions that would inevitably come to a head.
They were perfectly fine with American evil as long as it was done with professionalism and decorum, as long as it didn't force them to confront or even merely witness the realities of their own politics.
And when I say "liberals", I don't just mean the supposedly 'progressive' Americans who identify themselves as such. I also mean Americanised clowns in other countries who absorb and regurgitate liberal ideology even without explicitly identifying themselves with it.
These types don't see Trump and America as antagonists; they see America as a protagonist and Trump as merely an ineffective or incompetent leader.
We are happy when Trump faces defeat. They criticise him for it.