Your story sounds very similar to mine. Sorry to hear tht it is also happening to yet another child. All we want is a healthy family right?
My xah blames me for evrything and says I'm taking my son away from him. He tells me my son will resent me one day. The first time I heard this bs, I questioned myself. This is the manipulation of the addict. They blame so they don't have to admitt wrong doing.
Remorse? Ugh, who knows. And honestly who cares. Just do what is right for you and your child. And, thankfully your child is young enough.
Blessings