He is an arch manipulator.
He has/had taken you all in.
Your DD has endured more than enough abuse and humiliation.
She has walked and even her departure was abusive and humiliating by him.
You have educated yourself.
Your DH is well out of order and still under the spell of someone who is wrecking your daughters life.
You need to rein your DH in.
You all need to block this toxic manipulative man. Every exposure to him or communication with him puts you all at risk of loosing your daughter back to this shit life or triggering his rage.
You all need to learn that you are not dealing with normal here where you can calmly explain her need for space.
You are dealing with a controlling, cheating, lying, thieving, abusive, emotionally violent Narc - who also happens to be a gambling addict.