I'm curious, have your parents ever told her that you have a medically diagnosed condition? I realize it may not change anything, but it sounds like she thinks you are a misbehaving child who should know better.
Beyond that, NQ is right. You know the truth, you know your own value, tune her out and be at peace with yourself.
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Mom to an amazing young adult AS son, plus an also amazing non-AS daughter. Most likely part of the "Broader Autism Phenotype" (some traits).