Please, I've heard this argument for years and it's worn quite thin.
In 2020 the Democrats stole the White House --- the Republicans drove the getaway car.
I will no longer waste my time trying to save and/or preserve today's GOP. In fact, I will work to defeat and replace it.
If - and that’s a BIG “if” - Trump decides to create a new political party, it will not be a disappointment in my eyes, nor would I shed tears for the GOP. I would very likely join the endeavor. However, I would not take any bets on its success at winning a three-way split - and with God-only-knows how many other factions that might decide to enter the fray.
Ancient Chinese curse: “May you live in interesting times.”