You do not owe chaos continued access simply because it knows your history.

Long history creates a sense of obligation that has nothing to do with how the relationship works now. Someone knowing your whole story is not a credential, and the fact that they were there for the hard parts does not oblige you to keep absorbing what they bring.

Separate what someone meant to you from what they currently do to your week. If the second is consistently bad, you can reduce access without erasing the first. Gratitude for the past does not have to be paid in present access.