Unless there's a swing back to restoring democratic norms there's no reasons the coming years are going to be much different, no matter who is elected president.
If Biden is able to take office I expect work to be done to try to salvage things.
Absolutely nothing prevents that from happening again. The economic, social, and political forces that disadvantaged large swathes of the public, riling them up enough to make them take a chance on Trump, are all still there. If anything, the fact that the COVID-19 recession is likely going to hit full force during the next administration and make their situation even worse makes voting for demagogues even _more_ likely. Biden isn't going to be able to wave a magic wand to fix the world even if he wins, which is not a given.
We're in for a bumpy ride.
But that climate, the white collar criminality, the nation wide rampant electoral schemes, the inequality haven't changed. What gave birth to Trump winning the 2016 election is still there. If I understand correctly, there's no reason republicans would support a democrat president trying to salvage thing considering they didn't prevent the swift acceleration in deterioration during the last four years.
Maybe Trump was an unknown as far as the governance he would provide but it was known what kind of individual he was (and to an extent what would happen if elected, in broad lines).
I don't know, I am in the final chapter of Sarah Kendzior "Hiding in Plain Sight: The Invention of Donald Trump and the Erosion of America" and things do look grim indeed.
As a consequence, it'll take a lot more than one term to undo everything that Trump has done in one term, and the way things were before Trump wasn't really peachy either.
One Trump term is going to require at least a decade to undo, and that's if it remains at just one term. Now add climate change on top of that and the future looks pretty grim.