Hi Dune272 and welcome to the group

It sounds like you're wondering about BPD in a parent-child relationship:
The attachment I assume came from neglect in childhood for somme?
Could a parent have it and the child to them?
If a parent never wanted to discuss with that person when saw internally they were in pain and instead deflected or said there is no point seeking help as nothing anyone can do, what would that behaviour be?...
And how does someone heal that stunted child if one,the parent cannot look internally?...
My questions are how to heal the rejection,stop the blame game from a parent that won't recognise their involvement in the situation?
Many members here are coping with a parent with BPD (whether diagnosed or not). While BPD in a parent presents significant challenges to a child, many members here have taken charge of their own healing journey, regardless of whether or not the parent admits to being hurtful.
A good summary of some clinical info about the child/BPD parent dynamic is our article on
Have Your Parents Put You at Risk for Psychopathology. Take a look there, and let us know what resonated with you and your situation.