If you make self-fulfillment a goal and fill yourself you won't have the capacity for your mother's toxicity. Nor will you be desperate for her crumbs.

Ask yourself, what do you want, expect, demand, even beg from your mother?

That is what you fill yourself up with and that is how you break free from unneeded heartbreak, disappointment, and dependence of a broken relationship that didn't sustain and left you unfulfilled anyways.