I think the better question is whether Joe Biden deserves a second term.
obviously not, but he's running against someone who deserves it less. If either party was an intelligent entity, they would have ran a boring normal. But the majority of primary voters in both parties are dumb people who care more about their own stupid pet issues (or worse, only care about pissing off "the other") than they do the good of their country, or even whether their own political party wins or not.
Revealed preference is a thing. Voters said they wanted other options, but then overwhelmingly renominated both Biden and Trump despite the availability of alternatives.