This is a problem, but there are three things you can do.

(1) Recognize that not everyone is in the same boat, and temper your local disheartenment with enthusiastic encouragement for people in swing states to pick honest non-corrupt candidates. (You are commenting online, you know. Anyone can read what you say.)

(2) Register with the other party, assuming you have closed primaries (most states do). Now your vote matters more.

(3) Talk to people (incl on social media) about the most upright candidates in the other party, if people know your affiliation. "You know, J. Doe seems really smart and honest. Normally I vote more on issues that character, but (they might be able to persuade me otherwise / I have to say I'm impressed to see someone like that on the other side)."

But, yeah, if the game has to happen without you, fair enough. Democracy is a distributed burden, but not everyone has to or can carry the load; context matters.

I'd still ask that you please not drag others down in the meantime. We need more players, not fewer.