It's not even that it's one party. Since there's only two parties, there's a lot of variance within each, and you can be a Democrat without trying to make freelance work impossible, petty crime routine, streets smeared with human excrement and a trip in public transportation both rare and dangerous. I don't see why even somebody who would never vote Republican still can't choose not to vote for somebody like politicians who pushed through the idiotic AB5, for example. Or the ones who have been in charge for so many other ills plaguing modern California. I don't think it's party-against-party thing. If CA voters wanted, they could vote for much saner policies still well within the mainstream of Democrats (or at least something that has been mainstream of Democrats before 2016), but for some reason they do not.