Hi tnbh
So sorry to hear this, about your short marriage.
I felt in someways the same thing about not being able to make my marriage work.
For me it was important to think about my values. How do I want be treated? How much respect is important to me? Where are my boundaries? And what you are saying about your daughter and about her being dangerous - I guess this is about healthy boundaries too.
This article could be helpful too for you:
The Characteristics of Healthy Relationships