Mistreatment doesn’t have to be defined in relation to whether that’s the only way you’re treated in the relationship. Mistreatment doesn’t have to be qualified with “but they’ve also done really nice things.”
You are not lying or misrepresenting what happened just by telling what happened.
A person’s kindness is not a canned good that can be stored. When someone mistreats you, that doesn’t just knock a couple points from their score and leave them in the positive if they’ve built up a log of kind deeds beforehand. That’s not how it works.
You deserve to be treated right, no matter what other good things they’ve done or how kind they can be when they choose to be.
You’re not obligated to use those memories against yourself.