Try thinking outside the box. Doing the same thing over and over again isn’t working. In fact, it’s making things worse. The electoral primary system is ineffective when it comes to removing incumbents. They win over 90% of their elections.
It’s ineffective when cowards don’t vote. The vast majority of people who vote in a general election don’t vote in a primary.
Lazy feckless cowards put us where we are at today.