Fact is, there was a large chunk of the electorate which felt that what was needed, much much more than anything else, was to kick the existing political system very hard indeed. Because it simply wasn't working for them. They would accept four years of a goon in charge to achieve that. They've delivered the kicking and got the goon. Let's see if the kicking works.
It may turn out, along with Brexit, that it works better in countries who have elections coming up. In the face of these 'impossible' results actually happening complacent self-serving politicians there may decide to pay attention to the voters. If it does then good, and the self-harm that we and now the US have inflicted on ourselves may do at least some good.