I have. My local party chair is an establishment rino. Tried the get involved route. Nice try.
Oh you “tried” but it turned out to be hard. And THAT is why they get to do whatever the hell they want. So many folks find that anything beyond complaining is just too much effort. Getting involved isn’t a one shot deal, it’s a commitment. If you want the local party to change, you need to WORK AT IT. You successfully identified the problem, but couldn’t be bothered with the solution (find the alliance of people who want to dump him, there’s always some, and HELP).