Unjust custody situation

What would you do? Long story short. Move in with husband and his family. Naive. Didn't know how controlling they were going to get. Get pregnant early on in the relationship. My father promises to sell his vintage car if we ever need it. Later renegs it. Won't explain why. Gaslights me. After the baby is born. Get Post natal depression. Husband's parents kick us out. Husband loses his job xand I couldn't get work. My parents go overseas for months. My parents eventually get back. My in laws use the legal system against me and file for custody of my daughter. Husband begs me back. Many empty promises of getting custody of my daughter back. Move in with him (without in laws) Many empty promises of getting our daughter back. Marriage becomes financially, emotionally and physically abusive. Move back in with my parents and baby. I feel like such a fool. But don't get any answers as to why my father screwed us over.