You keep saying your a bad parent because you are poor.
Honestly, do you look at people in low wage jobs and think 'you are scum who can't be a good parent?' Im pretty sure you don't. It's just years of abuse makes people think funny (if you see what I mean), and belief all the evil hes laid on you.
You also say you are a bad person because you are depressed, sad, falling apart. That's not a marker of a bad parent, it's NORMAL to feel like that when you are living a life of terror and torture. It's NOT normal to be ok with it, or uneffected by it. It shows he is a monster to be evil enough to pretend to be happy and stable when he is warped and a torturer.
Put it this way, who is a better person and parent in this situation: a family who are in a war camp. Mother & children, mother gets tortured, starved and oh yes, water boarded. She is falling apart. But she loves her children through it all and remains as strong as she can for them. Or the prison guard, the one who does the torture, gets a kick out of his power and breaking others. The man is sick to the core, a devil with a smiling face. But he ruffles the kids hair as he passes on his way to give their mother a battering.
So, who is a better person in that situation? Who would make a better parent? If the woman escapes the camp, should she leave her children for the evil predator to have? Or free them too?
Say she leaves them in this prison camp and the guard brings them up. How will those children turn out? Fed, yup, watered, yup, and a steady flow of poison and evil whispered into their ears. Their eyes open to the daily torture he does to others.
In case you can't see where I'm going with this analogy. The children end up broken & damaged. They end up getting a kick out of the torture themselves, and join in. They turn into tortuters and killers themselves. Or they learn that this is what people do to women, it's ok to break them, to hurt them and rip them apart. So that's all they think they're good enough for as well. And join their mother as the prisoner being tortured and don't think they're even good enough to escape.