The problem lies with the current election system. Under plurality voting (which many countries unfortunately use) you're told to pick one candidate and shut up. It's a system that's rife with issues and is shown to lead to consistently poor leaders being chosen, 2 party dominance as opposed to proportional and diverse representation, and also is easily manipulated by political candidates. For instance, the Republicans have at times paid third party candidate (the Green Party), often by quietly funneling money to the campaign, in order to run a spoiler candidate who'd steal votes from their Democratic Party opponent.

Because of America's fundamentally broken election system, you're forced to pick between a mediocre but unappealing candidate in the form of Biden, whose voting history leaves much to be desired, or a literal psychopath who views fascist dictators with the utmost adulation in the form of Trump, and for whom objective reality is merely optional. Picking a third party is wasting your vote, and there is literally no alternative left-leaning party that cares about progressive reform but isn't entirely subjugated by trans activism. There's no room for any nuance in your choice due to the election system.

Serious reform requires changing our election system to something like Score Voting, which is far more resilient to manipulation, allows you to express an opinion about all candidates, does not have spoiler candidates, and gets far better election results.

As an interesting bit of reading: Hillary Clinton was the spoiler candidate in her own election. Had anyone other than her run in her place, Trump would not have been elected: https://www.rangevoting.org/USA2016retro.html

Unfortunately, because election reform would threaten the 2 parties in power, it will be difficult from a practical standpoint to get change. The closest you might be able to do is convince one party or both to use a much better voting system in the primaries, thus improving the quality of the candidates (i.e. we almost certainly would not have seen Trump as a frontrunner, who directly benefited and was probably elected due to the many pathological behaviors plurality/first-past-the-post voting displays).