That is why the Republican won almost 2/3 of the Senate seats being contested in 2020, and almost tied the House, and won most of the contested state races. That is also why in referenda, California, the super-blue state, defeated proposals to ban the “gig” economy, and to mandate racial preference for politically favored groups (in particular to have a numerus clausus restricting Asians). And suddenly, even Biden is having second thoughts about cancelling Trump’s “make America great again” tariffs.
Whether he is really a boor, or was “acting in character” from his media image as portrayed in “The Apprentice”, many people disliked Trump, but otherwise indicated approval for his policies.
It is true that some aspects of Reagan area Republican doctrine may be out of permanently favor, such as the muscular foreign policy (beloved by neo-cons) or free trade, but it turns out that on both of those issues, it seems more a matter of public opinion having moved, as the Democrats don’t seem anxious to support them either.
There were many irregularities in the election, which is to be expect do the first time use of mail-in ballots with no advance procedures, but while Trump is annoyed the fact that the Republicans won overall suggests Trump wasn’t cheated, and he lost not due to fraud, but because many people supported the Republicans, but rejected Trump.
The most likely change is that in 2024 the Republicans will run a candidate with Trumpian (populist, rather than conservative) views, but with the pretense of derekh eretz that normally characterizes professional politicians. If you are a neo-con, you are homeless. If you are a free trader (and support liberal immigration of workers), consider supporting the Libertarians.