Good point. There are some indications that a sizeable portion of Trump's voters are not right, and aren't fooled with his extravagant promises either. Rather, they purposefully voted for Trump because he positioned himself as an enemy of the established political class. Some of Trump's voter would be equally happy to support a decidedly left candidate such as AOC, if that candidate is seen as hostile enough to the established political class and the established rules.
It remains to be seen if a similar voting pattern can emerge in Canada or in Europe, or will remain a US-only phenomenon.
Hate to break it to you, but the populist mindset problems you just mentioned are happening all over the world (not just the United States), including but not limited to pretty much all of south & Central America, Canada (Think Rob/Doug Ford and idiotface from Alberta), pretty much all of Europe (with people going as far as electing near Neo nazis to send a message to the 'political elite' of Europe), East Asia (but that's more engrained cultured nationalism), etc. Point is, this sort of desire to give the government the finger has been stewing up all around the world ever since the war in Iraq, and has only been made worse by the Great Recession.
Think about it, Kenny campaigned on people's fears of job loss in Alberta and pretty much blamed it on the status-quo politics of both Alberta, BC, and the Federal Government of Canada, and used pro-energy rhetoric similar to Trump's to basically send a big middle finger to those who were not in support of pipeline policies. The same can pretty much be said in Ontario, instead of ousting Wynne by electing someone sane, the PCs and the NDP (but the PCs moreso) decided it would be a wonderful idea to point the finger at everything the previous government has done and convinced the public that ford was electable despite his own, and his family's past history.
This is not a US problem, it's a flaw with democracy — The fact that political polarization has concluded that compromise, centrism and realism as a whole are unacceptable in a party's vision of a country, and that the only way to combat these things is to retaliate in an angry, politically incorrect manner that appeals to populist manners. People don't care about policy, they care about the perception of being genuine, regardless of said genuine actions are what's best for a country (and a person's core beliefs) or not.
And the scariest part is that no one seems to care. I'll take most corrupt politicians any day over ones that threaten the core values of democracy — corruption can be tried, a broken political system cannot.
Sorry for rambling.