You are not wrong about him being a Bogeyman for the DNC. A old white man of the NY elite who switched from being a real estate shark to politics made a wonderful baddy.
I don't like him as person, mainly because of the way he acted over the Scottish golf course deal or how he does business. I don't like his politics either.
He is a product of American. American educated, raised in the NY elite society, made a living working in America, made even more famous by American TV and social media. In his younger days he was the NY elite golden boy.
He is not unique. The US elite are full of people like him and I think that's what scares the DNC.
He beat bankruptcy in the 1990's, gamed the GOP, beat Clinton, became POTUS, and fought every bit as dirty as the political class but with far less fines.
Some will love him for it, some will hate him for it.
At the end of 4 years I have no idea if he was a good or bad president (I have my own biases I need to be cognitive of), so I will leave it history to judge him in 10 or 20 years.
But I think we can all agree that the last 4 years has shone a spot light on the nest of vipers that is US politics. American made, American educated, American policies for American political parties, American hypocrisy, American corruption, all voted for by the American people and reported in American media outlets to be greedily consumed by the American public.
I think Trump failed to "drain the swamp" because it was an impossible task as politics is by its nature a dirty game to play. If anything Trump added more dirt to the "swamp" then f#cked off safe in the knowledge he does not need to live in the swamp.