A woman who rejected her mother for five years sought help from an advice columnist:
I’m so ashamed. I don’t even know how to make it up to my mom,
who through all of this always told me she still loved me, even with
all the hard words I threw at her. I’m beating myself up now wondering
why I chose to believe my dad when there were so many signs I was wrong.
This woman—who signed her letter “So Ashamed”—was victimized by her father’s toxic manipulation of her relationship with her mother and suffered a heartbreaking situation known as parental alienation.

https://ifstudies.org/blog/new-research-on-the-science-of-parental-alienation