Yeah my wife is this. I think it’s the direct result of bad stuff happening and getting told it’s not your fault. At some point you start believing nothing is your fault. The other side of it is believing everything is your fault.
It’s a matter of responsibility. Taking responsibility for everything is hard on you. Taking responsibility for nothing makes your actions hard on others.
They split when she was 3. Stayed with her mum. She remarried but that didn’t last.