We conservatives control about 75% of the GOP, so we're better off trying to get rid of the 25% who are establishment RINOs. We have made tremendous progress over the last 5 years, but still a long way to go.
Could it possibly be they're sick of being hoodwinked, conned, lied to and deceived by Republicans for decades?
What do you think the solution is?
Look, you asked the question and you were told a legitimate answer as to why. You not liking the answer is something you have to deal with.
Given the clear track record of Republican lies and deceit for the past few decades, could the solution eventually be 3rd party? Absolutely! This is what happens why you lie and deceive the members of your own party.