The vast majority of your fellow Republicans disagreed with you during the primary season. They could've picked Desantis, VR or Haley. But instead Trump resoundingly won the nomination. The only reason Haley stuck in as long as she did was the hope that one of the court cases would get far enough along to wreck him. And even she is pragmatic enough to eventually drop out and say she will vote for him. She understands the possible consequences of the damage that could be done to the party by this swell of "never Trumpism" and to the country with another 4 years like the last 4.
But lets just say you get your wish and Trump gets annihilated so badly that Trumpism dies in the party. What does this supposed "reset" look like? What percentage of the party do you reckon are dyed in the wool MAGA? For the sake of argument, 20%? 25%? Hell, even if it's 10-15% do you really think you can afford to bleed off that much support and ever hope the Republican Party wins a POTUS race again in any of our lifetimes? Does this "reset" button come with a time machine to take us back to the 80's?
Reset?