It could have been seen as a warning shot, letting both the USA and the rest of the world experience in real time what it meant to let ignorant, greedy fanatics take the country over, even for one presidential term.
But now, it has happened again, and that is (or, at least should be) a solid reason for the world to at best put us on probation for a very long time. Sure, the how and why blame game can be thrashed out for the next half century. Putin, Bernie, Hillary, Biden, Harris, blah blah, BUT----the fact remains that if 40% of the voters in the USA will willingly deliver their votes to a party that lacks competence, compassion, or any trace whatsoever of a conscience or scruples. Sure, there's the issue of available cash for campaigns, and, frankly, at this point, I think a law requiring publicly financed campaigns would be anticipated prior to enactment, and easily circumvented, with any circumvention being sanctioned by the Thomas-Alito court. Yelling about "billionayahs" and "the rich" only glosses over that there are tens of millions of voters who will believe any Monster Goose Rhymes that extremist right sources will throw at them. Things would be a LOT easier/better if we had a "politically neutral media" act, but good luck enforcing that one.
My comments are more to be taken as an observation from here in EU-land than knowledge gleaned from conversations with Canadians. However, I do maintain some old friendships up there, including one of their former ambassadors to the USA, and they seem to have a healthy perception of whether the USA is going through a chronic cough, or if we as a nation have contracted long covid. (Hint--they think it ain't the cough)