Ending my (29M) friendship with my ex (26F) - should I confront her bad behavior?

I'm a (29M) who had a messy, on-and-off, open relationship with a (26F) for about 7 months. We broke up amicably, and have hung out a couple of times since, but the more I've thought about our relationship, the more I feel like her behavior at certain points wasn't cool. I want to go no-contact, and I'm not sure whether to bring that up or just let it go.

What's messy is that I'm not sure if she intended to do those things, or even realizes how they felt from my end. For all her great qualities, she's also kind of immature (flighty, impulsive, self-centered, emotionally reactive) and I feel like a lot of our worse moments were more a result of her personality than of conscious decisions. I want to convey that I was hurt, but I don't want her to feel like I'm criticizing her character and end up in one last argument. What tack should I take?

tl;dr: ending friendship with immature ex. Should I address her behavior, or just leave it alone?