What is going on with women who refuse to leave an abusive relationship? I am seriously starting to believe it is some sort of disorder. I don't mean to insult anyone or judge them. No one knows what someone else is going through unless they walk in their shoes. I am genuinely trying to understand. How can people help?

There are so many different situations in this.
Many are verbal abuse or abusive Narcissistic relationships.
Many are not abuse but circumstances surrounding children.

Nana never suffered ANY physical abuse. My ex had a clear understanding from day one that if he ever laid a hand on me the sob would have to sleep sometime.

Mine turned into a drug addict alcoholic, we had to go thro a period of treatment tries and waiting til the kids finally decided that he would never love them enough to stop.

He was a fried pie years later before he died. There is a point imo when ppl take so many drugs for so long that their mind is simply not recoverable.
His sister was the same. She died of an overdose the night my son was killed in a wreck.