>That you've got one of them now should be eye opening enough that this doesn't happen again for a fucking long time.
That's not what's likely to happen, though. Trump may be a garbage fire, but he still won, and the "politically competent" candidate still lost. Plenty of Americans still believe almost religiously in the concept of a "CEO in Chief," and they won't be giving that up any time soon, even if they disavow Trump as an exemplar.
Both parties are probably going to field primarily business-oriented candidates as long as it seems the electorate wants anti-establishment, anti-political leadership, at best they'll try to make sure the next one isn't as much of a buffoon.