FYI I'm not American so I won't be voting for either. But I think you are contradicting your own argument when you say:
tl;dr: the distinction between dems and reps is not one of “left/right” but rather one of “right/further right”.
What I was arguing was that the Democrats (aka liberals) are further left than the Republicans (at least in some key social areas). So, while you have defined the difference here as right/further right, that is still an acknowledgment that they are to the left of the Republicans, even if they are "not-quite-left-enough" to qualify as leftist from your ideological perspective. So, it still makes no sense to treat them as equally bad options - there are still degrees of 'bad' we should be concerned about to minimise harms.
It seems to me that many people on the left are currently earnestly trying to destabilise the US by pushing it even further towards right wing fascism, in the hope that it'll eventually provoke some sort of domestic revolution or an international backlash to US influence. This seems to me like a high-stakes strategy that could horribly backfire in so many ways, and I just can't get on board with it.