Then again Republicans are going to flip back to claiming things are important that they completely ignored for the last 4 years and will screech about Socialism and the war on Christmas and Christian values non-stop during the Biden presidency. Biden will get a pretty free pass from the left to begin with but, in a way, I think there will be greater expectation to actually get something done. If after all these years of Trump, Biden comes in and is ineffective and achieves nothing that the left want, we could be looking at yet another right wing extremist waltzing in off the back of the left refusing to go to the polls due to being disillusioned. This could set a cycle of right wing extremists coming in off the back of left wing disillusionment who then get replaced with the likes of Biden, who are basically just right-lite. The USA is constantly lurching further and further right.
Republican candidates do not care about governing for the whole and do not care about upsetting the left. They have no interest in working with the left and are prepared to do whatever it takes to win. The final years under Obama and the Trump years were not an abnormality, that is how they now operate and that is how they are going to continue to operate until it stops being beneficial to do so. Democrats are ultimately still cowardly and seem to spend a disproportionate amount of time trying to put down their own base to appease Republicans. If one side has decided it's a war, you can't be passive.
Watch this space, short of Biden achieving an economic miracle in the next 2 years, Democrats will lose the house and senate in 2 years time and will then lose the presidency in 4. They are setting themselves up to fail.