I didn't say they have run it into the ground, I have only stated that they have divided the Republican vote by refusing to support the "RINOs" that could actually win.
It seems we are at an impass. You say moderates have stabbed the conservatives in the back by failing to come out to vote for distasteful candidates with zero charisma like Bill Simon, and I say that conservatives have undermined the party by refusing to support any candidate who is less than ideal.
It is two sides of the same coin, and the only ones who win in this toss are the Democrats.