While I agree that supporting "status quo" is a central part of electability in US politics, by all means, if you have strong opinions about things, go get elected. Go run. There are plenty of places where you can become very powerful without having to go through a primary - all Louisiana offices, San Francisco, and numerous non-partisan roles throughout government everywhere, and anyway, you can get RCV passed, just like it is in some big US cities, which is to say...

You're talking about ideas that keep failing in elections, and then you demand just one more election but with different voters, and then find out that voters there don't like it either, so at what point do you admit you are wrong? That your idea of "good stance" is actually a "bad stance"? Another POV is, your grievance is, fundamentally, projection.