I only discard the idea of “vote Biden to prevent Trump”
Then you are... well, I won't say you're my "enemy" exactly. But I think you're making incredibly stupid decisions, and then being dishonest ("just do it cuz they’re the candidates of the party" when the logic was literally pretty much the opposite of that).
If the house is on fire, then leaving the house is urgent. Preventing Trump was urgent. Saying it's not worth leaving the house because you don't like the weather outside is ridiculous, and framing this past election like preventing Trump was not urgent, even now with the benefit of hindsight, shows some really remarkably bad strategic ability, and I don't think I really want to listen to your political wisdom as to how to look at things or how we can get out of this mess now.
only the idea of “vote for the lesser of two evils”, as it has only proved to sink the boat so far
My point bringing up 1968 and 1992 was that refusing to vote for the lesser of two evils, thus opening the door for a much much greater evil to reset the bar downwards and also motivating the Democrats to move to the right since the left isn't voting for them anyway, is precisely and exactly what has been sinking the boat.