All other things aside, President Biden will make 2021 a better year.
I'm pretty amazed that people are predicting that 2021 will be worse.
While I do think a change of leadership will ease the burdens quite a lot, this country has fiercely demonstrated that nearly half of it is willing to be absolutely harmful and toxic in any way they can in order to ensure that they're known and heard. Biden is just a tiny piece of the puzzle of the social realities of the United States, and the larger roughly half of the population that backs Trump will still act the way they do regardless of Biden sitting in the White House or not. This isn't a problem that just easily disappears with the changing of the President, though the changing of the President like I said will at least ease the burden that the strain of the federal government puts on the various problems going on right now.
We'll still probably have anti-mask protests, Proud Boys Rallies, a multitude of conservative media outlets all screaming corruption, unfairness, unAmericanism, etc. We've already got a suicide bomber in the US trying to make a statement, and tons of conspiracy theories circulating surrounding that that are sending the conservative half of this country into an absolute meltdown of logic that's simply not going to go away, and is feverishly emboldened by events as of late, because we elected Biden.