If you dont want libertarians stealing your votes... Dont run RINOs.
Easy math.
Didn't pick George Bush, Reagan did. Biggest mistake he ever made. Couldn't stand George H.W. Bush, but too many people wanted him in 1988, and he was the nominee in 1992.
You fight with the army you have, not the army you wished you had. "Read my Lips" Badly damaged George H.W. Bush's chances of wining. That was the only thing the Democrat Congress wanted out of the deal they made with him. (as usual, they didn't honor their side at all.)
George Bush was so naive about Democrat intentions that Not only did he not know which side he was on, he wasn't even aware that he was in a war.
The election was still recoverable though, but for the efforts of Ross Perot undermining George Bush's election chances. Ross Perot helped Clinton damage George Bush, and along with the Communist Media, it was enough to saddle us with Clinton, which was a Major disaster far out of proportion to the gripes which Libertarians had against George Bush.
The Libertarians guaranteed we would end up with the worst possible President that time.
You go over all the reasons they lost well enough, but still refuse to see that the LP had nothing to do with it.
You cannot continue to ask the voters to eat sh*t and then get mad when they go to the non-sh*t buffet next door.