We'll see, but I doubt it will be that drastic.

One thing to keep in consideration is that the American left is stunned out at how high Trump's voter turnout was this year. They see their victory as a pyrrhic one. Go over to r/Politics, and you'll see many of them are legit fearful that a significant percentage of America has "fascist" leanings (I know it's amusing, but this is their mentality) and they know that in slightly different circumstances (e.g. no Covid-19), Trump would've won in a landslide. They were hedging their bets on a total repudiation of Trump and a return to a pre-2016 'normalcy'.

Trump is gone, but they know that someone just like him, or someone further to the right could win again. Hell, he might even run again in 2024 (I doubt that, but you never know). They're going to be very cautious about pushing the boat on policies that get the backs up of their voters.

They will also need control of the Senate, I'm not American so I don't know the intricacies of that, but I think the GOP are going to maintain a slight majority.

What you're likely to see is the slow boil. The number of 3rd world refugees admitted to the US skyrocketing, more woke shit entering the discourse, more regime change bombings/wars (Europe can look forward to Migrant Crisis 2.0 by 2022 I'm guessing), etc.