Trump is also seen as the end boss, defeating him means defeating all that is bad (and Russia) and things can return to normal. He's seen as the beginning and end and not as you say just the next step in the road to whatever -ism you want to describe the US as.
Even if Biden wins, the Dems appear to have learned precisely zero from Hilldog's loss, have zero interest in doing anything remotely radical to improve things and are effectively just going to kick the can further down the road, but hey, the muslim ban will be overturned, the ICE camps will still be there, but not in the news so much and we can all go to brunch.