I don't know about that, but certainly it has exposed a significant weakness in the US democratic structure: it is based on the supposition that everyone will follow the rules (i.e., accepting the results of an election, following the laws passed by congress, etc.) A president who defies both conventions and laws is hard to stop. The only mechanism is impeachment, and that as we have seen is _extremely difficult_ to do -- in many cases that has been used frivolously by both parties, but even in the case where it should have been a slam dunk -- Trump's attempted coup -- the most GOP senators were too afraid of their own re-election chances because of Trump's ability to "rile up the masses" (look at Liz Cheney). A climate of fear is an essential part of authoritarianism because it paralyzes those who might be able to take action to ensure that the democratic principles are upheld.
When you have an angry mob attack the capitol building and threaten to kill politicians, and they are pardoned by the person who incited them, that generates a lot of fear.