Memes

Blocking movement to the left is why you're left with a rightward trend. Not just because the right itself "moves right" but because Dems' political nature breeds false consciousness and confused disillusionment. Dems promise basic things like a student debt jubilee and then do a little weak attempt at it. So then people leave them behind. Even worse, Dems help create the degrading conditions that provokes an anti-liberal backlash (liberalism being the dominant ideology of capitalism, not just US Dems), and then Dems work their hardest to fight the associated leftward shift. But not the right: their radicals are useful for crushing that new left, as the left is anticapitalist.

Most importantly, the bourgeoisie electoral system provides an illusion of control. You don't actually choose the lesset evil. You just throw in a vote for candidates preselected for you by capital and the party (a party in which you have no say) who will never actually be able to fight the right or adopt anticapitalist positions, and will therefore never be left. You, and the people, are not in control in this scenario. This scenario just provides consent for what capital wanted anyways, just with two different flavors: genocidal fascism with a good PR team for the theoretically empathetic and genocidal fascism with an okay PR team for braying hogs.