I hear where you're coming from, but I don't know if I agree with the notion (if I understand you correctly) that voting for the lesser of two "evils" is a cultural problem. It's distasteful to an extent I suppose, but it's also realpolitik. Realpolitik is at its essence pragmatism. Voting pragmatically reflects maturity and wisdom in my mind. That's not to say we shouldn't push for high character pragmatic people like Obama, but I don't think it reflects a cultural infirmity of spirit to vote for someone who's good but not great when the alternative is literally exponentially worse.
I'll also say I don't think it's fair for people to characterize Biden as an "evil" choice. He's imperfect and not as innately progressive as I'd like, but I think he is a good and decent man and will surround himself with a diverse and very progressive team that will enact the most progressive agenda America has seen since LBJ.