Yes, Hillary is probably the worst candidate that the Democrats could have nominated this election year. But that ignores the question of why Middle America is angry. As JD Vance noted in his book, Hillbilly Elegy, these folks are in a lot of pain. And worse, they are ignored, by a liberal political elite who fixates on identity politics and culture wars and belittles their concerns.
Trump, in essence, is their outlet, their way to give the liberal elite a big middle finger. Do they really believe that Trump is going to build the wall and deport all immigrants? No, most of them don't. In Peter Thiel's words:
I think one thing that should be distinguished here is that the media is always taking Trump literally. It never takes him seriously, but it always takes him literally. ... I think a lot of voters who vote for Trump take Trump seriously but not literally, so when they hear things like the Muslim comment or the wall comment, their question is not, 'Are you going to build a wall like the Great Wall of China?' or, you know, 'How exactly are you going to enforce these tests?' What they hear is we're going to have a saner, more sensible immigration policy.
In short, Americans voted for a hyperbolic showman in order to shift the conversation to things that really matter to their lives. Whether they will achieve their goals is a huge question mark. Trump will have to face his biggest test: governing.
So what's next for the world?
I would argue that, Trump being Trump, he doesn't really care much about the American ideals of spreading democracy, improving human rights conditions in foreign nations, etc. In fact, I predict he will be both isolationist, in the sense that he won't attempt to expand American power abroad to protect human rights, and businesslike, in that he will solely focus on making deals. I know that this is cliche, but I think he will be Putin-like: he will be quite coldblooded in his foreign policy dealings, probably not dissimilar to pre-Carter US foreign policy.
While this may be outrageous to many people hoping to have the United States to maintain its ideals, Trump might actually drive a stronger and more effective foreign policy. But the key question is whether Trump has the discipline to do so. Plus, he needs to deal with skeptical leaders from all over the world, who wonder whether Trump is a showman who can actually deliver or just another snake-oil seller.
Many people, in the US and around the world, believe that he is unsuited to govern. Obama even declared that Trump is unfit to be the president of the United States. So in the end, it could very well be somewhat easy for him to prove his critics wrong because he has such a low bar to cross. Strange as it may sound, seeming only slightly sensible on governing issues is probably a big win for him politically.