Without the conservative Republican Party leadership not realizing just bad it was, the base of the party had morphed into a fascist party mentality that Trump ran off with, leaving conservative true believers with only dead-end roads.
If the conservatives slide over to the rump Libertarian Party — as a Trump protest option — that road leads to a nowhere swamp. It the party conservatives reluctantly back Trump that road leads to conservatives being even more marginalized with Trump endlessly jerking them around in some most humiliating ways. If conservatives try to start a whole new party from scratch that road takes them permanently in to a minority party wilderness.
Via their own pandering to know-nothings, Republicans have left themselves no road to a bright future. They have become caught up in their own web of hate and silliness.