Retiring as champ?

Just a question about retiring fighters.

So far i have had long term champs who have been in many wars and i want to wind their careers down but they dont show any signs of wanting to retire.

Problem is once they lose the belt, their relationship with me becomes poor and they dont want to discuss with me. I get a few wins and they want to retire again but i find if i win a belt, they change their minds. So i am stuck in a loop of champ who wont retire, or a guy who lost a belt but wont discuss plans with me.

Anyone had any champs “go out on top” ? Or do i need to get a few wins after losing a belt to retire?