Ironically, that was one of the biggest campaign points and voter sentiment on which people flipped to Red. We all know what happened.
Sitting out of the process does absolutely nothing, whether its a protest vote, pretending that politics don't affect you, or just giving up completely. The people who get elected in those situations always 100% ignore you.
When people are in office that are at least willing to listen, you then make a lot of noise and put on pressure. You might get ignored mostly, since you are a minority voting block, but you can make incremental gains and even sometimes big wins.
Black citizens make the most progress by strategies built around embarrassing the powers that be. Those powers generally capitulate (as much as they ever were going to) after a period of tantrum-throwing, which is where we are now. Such politicians hate having to vote against the donor class's wishes, but they'll do it to get reelected (or they'll be primaried by candidates who will). Or, they'll lose. Those are the choices, which Kamala Harris unfortunately learned the hard way.
One other thing black folk have known for decades: nobody you can put into the White House or the legislature will be able to stop half the country from thinking of you as a n!gger. You don't vote based on that because Carter and Clinton and especially Obama and Biden have shown us that election-based social progression is a pipedream.