And yet the United States continues to slide into fascism despite having elected Biden. What horrific Trump era policies did the Democrats even bother to repeal after they won in 2020 and held both the senate and the house?

They are still funding the construction of border wall segments. They never repealed the Republican tax cuts. They have done nothing about the concentration camps on the southern border for fuck's sake. They never codified Roe v. Wade, we literally lost the right to abortions while Biden was in office. They could have stacked the supreme court but they didn't.

The Democrats and the Republicans form an obfuscated one party system in the US. Republican leadership aggressively ramps up the oppression of marginalized people, then Democratic leadership does nothing to restore our rights nor proactively prevent the same thing from happening again. Instead they just use their time in office to suck all of the energy out of people's movements that could actually effect change.

And much more importantly than all of that, Republicans and Democrats are virtually identically evil when it comes to foreign policy. When the US is dropping bombs on you and destroying your country, you'll tend not to care whether it was a Red MAGA or Blue MAGA administration pulling the trigger.

In some specific cases it might be worthwhile to vote for Democrats in local elections where there exists much more leeway for politicians to stray from the party line, but voting for them in national elections is just lending your voice to legitimizing their bullshit good cop/bad cop routine they play with the Republicans.