As a republicans living in a rural area, I have to disagree with your logic.
The issue with Trump isn’t his politics but his policy. I agree with his politics, we are both nominally Republican after all, but when he goes to implement it the policy is incompetent at best and actively harmful at worst.
For example, both Trump and I support the ideal of strong Republican leadership. I want to achieve that via elections, he aimed to achieve that through illegal power grabs attempts at last 4 years capped off with inciting a violent riot against his political opponents.
He has simply gone too far.
He stood in front of a crowd and told them to seize the party for himself, then after the riot called them patriots and told them they are loved.