A broken family would be better than what she has.it's not that bad tbh. it's not like their relationship is irreparable. they just need a good family councelling/guidance so they'd both realize their shortcomings, wife being all-assuming and husband being extremely passive, and hopefully mend it to the right direction. you'd also have to consider the child's wellbeing when you decide for divorce. no child is deserving to bear the agony of a broken family. that route could've probably possibly done sooner if they didn't have a child. i hope it goes well.
The last lullaby she got from her mom was a rant about how terrible men are. The mother makes things up about her and only sees herself in the kid, the father sees her as her own person. It's a miracle she's not more messed up after all of this.
The mother would need a complete psyche change to be a worthy mom.