I was in a very abusive relationship for almost 30 yrs .
I think this is where you're going wrong, you've compartmentalised the abuse. Your daughter was brought up in an abusive household which is considered to be child abuse.
I don't know what kind of abuse she witnessed but if he was regularly hitting you, shouting, drinking and otherwise causing an intolerable atmosphere, then she also suffered.
It's not unusual for the whole family to tiptoe around the abuser to the detriment of everyone else in the family. That means children's needs take a backseat to the abuser.
I had very low self esteem and a very harsh childhood, lost my mother when 9 left with a very violent father and 5 siblings . Sexual abuse in care when dad needed a break.
I'm sorry to hear you suffered as a child and that no one protected you. You might find therapy helpful or could contact NAPAC for advice.
I feel my daughter had a child hood of everything she wanted her father spoiled her rotten.
Your daughter lived in an abusive household and no one protected her from it. From her perspective, you enabled it and chose your relationship over her welfare.
It's unlikely he wasn't abusive towards her. I find it doubtful he was very abusive towards you and a completely different person towards his daughter. If he did buy her things, that doesn't make up for what she missed out on as a child; a loving family home.
I just don’t know why she continues to make me feel useless and things she has done are all my fault
She suffered as a child, probably has difficulty forming relationships and has poor boundaries making her susceptible to being abused herself. Her blueprint for relationships was your relationship with your husband. She's bound to be messed up.
She obviously feels as though you should have put her first and is finding it difficult to understand why you stayed given the abuse.
She needs therapy to process her childhood. She might be willing to move forward once she's done some of the work.