telling the Democratic party that you will eventually vote for whoever they put forward tells them that policy differences aren’t an issue they have to worry about, eventually all, or at least most, will vote for whoever they tell you to vote for. That is why most Dems are so easily sheepdogged and the party never changes. The last Republican I voted for was Reagan, and I knew that was a mistake before he was ever inaugurated.
Lessor evil votes are easy to avoid, never vote for evil, lessor or greater. If that means that the lessor evil loses, so be it! The party will learn that running bad candidates because they are superior to a worse option is not a path to electoral success and they will stop that practice …eventually.
I will not vote for lessor evil candidates no matter how bad the other candidate is. I will call out evil candidates no matter how bad the other choice would have been. If you are a bad/evil candidate, I will not vote for you regardless of what letter is after your name.
RCV doesn’t eliminate this it merely makes it easier to deny you the choice you have listed at the top of your RCV ballot. by forcing you to give support to candidates you didn’t prefer to win.