Remain calm and vote Blue.
This blue-no-matter-who (and same for the red-until-I'm-dead people) strategy is such a turnoff to many of those closer to the middle and/or independent who still look at issues, positions, and candidate attributes. If those things do not matter at all to a high enough % in a given party, then the billionaires with influence at the political party level will meddle and we end up with what we have this election. It remains to be seen if that is a winning or losing strategy. Personally, I reject that and it's irrelevant to me if I'm in the minority on that way of thinking or not (e.g. I'm not religious at the moment even though ~85% of the world is, whatever the majority do is just not that relevant to me and my own bubble). If you want my vote (albeit insignificant) you have to earn it. It's not automatic. Who a party throws up there on the ballot matters, at least to me. And I'm not asking for much. AOC would be an interesting hypothetical for me as I think she needs some seasoning/maturity but overall I would be much more inclined to vote for her (as an example, there are plenty of other choices I'd more readily vote for) and the presence she brings than I would be for Biden. On the other side of the coin, it would take a pretty amazing candidate (like a 40s-50s John McCain-esque type would be intriguing) to tempt me to vote R (and the D candidate would have to be mediocre or terrible) and it certainly isn't going to happen with Trump. I mean, Trump was a Democrat as recently as the aughts of this century. If he was the guy on the D side of the ticket, would all of the blue-no-matter-what be voting for him now? I wouldn't vote for him as a D but to each their own.
I'm not hating on your personal strategy. Do whatever works for you. I'm just pointing out that it can be alienating to others (based on the context and the candidates) and if that turns out to be a losing strategy for the D side, are they (the party) going to continue to trot out likely losers in the future that only the "true Blues" will vote for or are they actually going to listen to the people instead of the oligarchs to capture more of the middle ground? So much data is collected nowadays and it's still shocking to me that the political machine of the D side thought this is the best they could come up with (after the guy said years ago he wanted to only do one-term). It could still work, though, who knows. Staying calm over here yet in a different way.
Stop acting like anything else matters. MAGA forces are playing on our fears. We are the majority.
I will keep acting like there is more to life and politics than who the damn POTUS is. Biden has been president before. Trump has been president before. My life was great before either of them took office, continued being great during their terms, and I suspect will continue to be great (health-willing) after these sociological experiments are put out to pasture. I understand that whoever the next POTUS is that we will still fund wars I don't agree with and kill far too many civilians, we will still lose topsoil, feed poison to everyone, slam the other side of the political aisle, adhere to big lobbyist groups, the power of unions and workers' rights will still be eroded, health insurance will continue to be inefficient, SS will continue to be underfunded if you run any projection out far enough, mass shootings will still happen, healthy fetuses will still be terminated, unhealthy fetuses will still be terminated, we will still support slavery with our Apple and Android purchases, pythons will still take over the Everglades, vets will still suffer disproportionately from mental health and homelessness issues, will still have profits prioritized that hollow out infrastructure and overall quality that lead to accidents, will still have far too many opiate ODs with not much changing, garbage patches of plastic in the oceans will still grow, and natural disasters will still disproportionately wreck the underprivileged. I get all that. All those issues (and countless others) are either completely outside my circle of control or only very marginally included. There are just so many more elections/choices, ways to spend money, ways to donate/spend my time, ways to choose who I hang out with, ways to earn money, ways to exercise, ways to travel, and ways to engage the mind that are more impactful to me (or even more impactful to political issues I care about relative to the power of the vote itself). It doesn't mean nothing but whoever the next POTUS is will be pretty far down the totem pole of importance in my very privileged life (VERY thankful for the where and when relative to the other 110 billion humans to have ever existed). YMMV.