Bush (both), Reagan, hell even Nixon; you can find people who actually liked and supported them and could articulate an argument as to why. It might have been across the board wrong even nonsensical, but supporters for those people could at least present a set of reasons within some mental framework well enough that I at least believed that they believed it.
But not Trump. Even the people who are slavishly devoted to Trump to an almost cult like level can't seem to find the words to say why.
Seriously when was the last time you heard anyone; here, in real life, in the public discourse, on the news, actually present an organic, honest, top to bottom reason why they liked Trump? I can't remember. Honestly I can't remember if it's ever happened.
Everyone who "likes" Trump seems to only be interested in Trump's role as the symbolic argument for some greater argument, be it sad nihilism or reflexive "You can't tell me what to do or think"-ism.