When I had a child me and my then husband (amicable divorce, not recent one due to coercive abuse)
we made a vow between us not to visit the problems our parents had bequeathed on us to our child, and we largely succeeded.
Not without an 8 year blip which was sad and hard to bear, and I can trace back to both me and then DH. Me, a long severe depression that meant I cut contact to all.
but the difference is that both me and then DH did not ^blame our parents, (done a lot of therapy):
we understood why they had been as they had been and then looking at their parents and so on.
The blip is now understood: time and hard work just being responsive and not making demands on them has paid off.
Its terribly sad and I realise many of you are talking about much more nasty situations, (abuse, active cruelty) where blame is appropriate
but the human tendency to blame others for our ills instead of seeking to understand is very sad, isnt it.