You don’t get ahead by getting even. Dumping McConnell in favor of Grimes may feel good, but ultimately it hurts the ability of people like Cruz to be effective.
I’m guessing that there will be a lot of Kentucky Conservatives who will vote for Grimes, then HOWL when her presence in the Senate leads to further damage to the coal industry or erosion of gun rights, without understanding or acknowleging their own role in making it all happen.
You don't get conservative governance by voting for liberals. Ever. You get liberal governance.
Getting rid of liberals from the Dem party is impossible. It may be possible to rid the republican party of them. Pain will be involved, and it won't happen quickly.
This is what you are seeing happen.
/johnny