Lesson #1: Republicans, at their very worst, act almost as badly as Liberals. Oh the horror.
Lesson #2: The idea that there was anything fundamentally wrong on the Right prior to 2016 is such made-up, whiny Liberal nonsense -- so stupid and ridiculous -- that it's not even worth discussing any more.
Lesson #3: That there is a viable and profitable business model in having a regular rotation of petulant, thin-skinned Conservatives -- who were so utterly blinded by their preening arrogance and so drunk on their own mythology they never noticed that their own party was becoming a fascist shithole until that party kicked them to the curb and who are such abject cowards that they flee in terror from anyone who gets near them with receipts -- sit around for hours and hours, month after month, bitching about how awful Democrats are and how Democrats don't know how to do politics and how Democrats need to "be more like Mitch McConnell" and how the Democratic base is too fucking demanding and don't know how to defer gratification like Republicans do and how those feckless Democrats don't know how to do messaging and how Democrats...well, you get the idea.
On the one hand, our Never Trump allies continue to demonstrate all the useful and supportive appeal of a neighbor who, having completely given up on doing anything at all about his own burning, zombie-infested, feral-dog-shit strewn hellscape backyard, now spends all of his time leaning over your fence, faunching and carping about how your rows of beans aren't straight and how only a complete idiot would plant tomatoes that deep.
On the other hand, there is clearly very good money and job security is being exactly this kind of disparaging, denialist, self-righteous Conservative prig.
Here endeth the lessons.