All the real world evidence from abusive families is that children, for the most part, not only accept but readily forgive and even embrace absolutely horrific treatment from parents. This fantasy that estranged parents tell that they were just victims of circumstance, ordinary, just made a few mistakes is absurd.
I read this differently. Those who have been severely abused - sexually, physically, emotionally - are desperate to gain their parents' love and approval. Very often people in this situation grow up with severe addictions, and are unable to hold down a job. They are unlikely to be able to pay for expensive private therapy and may be unwilling to engage with the kind of help provided by the state.
Meanwhile there is a generation of young people who have been brought up to feel that their feelings and thoughts are paramount. An ultra-protective culture - designed to protect them from real harm - has created a lack of resilience. Social justice theory and identity politics means that they also feel guilty about their relatively privileged lives.
This guilt can be assuaged by claiming victim status.
They've also been misled into thinking that they ought to be happy all the time.
These factors all encourage them to believe that their ordinary imperfect parents, have damaged them severely. Rather as a frustrated toddler will lash out.
My sense is that these ordinary, imperfect parents, may get to the point where they just have to step away - get on with their own lives - and hope that their twenty and thirty year old kidults will eventually grow up.