The Democrats already tried out the idea that Trumpism would blow over and everything would go back to "normal" with Biden's 2020 campaign, but it didn't really turn out that way. Right-wing reactionary politics has been overrepresented in the US since its founding due to state based representation, and I expect that this will continue to be the case for as long as the US exists in its current form.

It would help if they actually ran a candidate that leaned more moderate than extreme. They seem to choose candidates specifically to rile up the Republican base. That makes sense if this is actually a football rivalry or something but if they want to get elected they need to appeal to the middle, which doesn't seem (at least from my perspective) to happen very often.