Every county in my state always votes red. Due to the way elections are held in this country, it does not matter how I vote. I could vote for Harris, on the tiny chance that enough others will as well, or I could vote 3rd party, and at least increase the percentage of voters doing that so that it doesnt seem as useless next time. Hell, I could vote for trump and there would still be no difference.
Don't alienate your allies if you want them to stay allies
Not every “red state” has enough blue people in it to flip, but voter turnout is absolutely the issue in most states. You wanna vote third party and feel connected to some little clique, fine. But don’t expect the Democrats, or the country, to ever change for you. Make your vote valuable.