You won't know me but I recognise your username, and I had noticed you hadn't been around much. That wasn't nice to read, so I can't imagine what it was like to experience.
By living through something like this and coming out the other side, you'll have gained a certain kind of understanding about human relationships and behaviour. It's one of those very unique skills. The kind that can't be acquired through textbooks, only experience. Your story sounds like living hell, but by the sounds of how you're speaking you're already on the way to bending this nightmare to your will, reshaping it until it becomes something that makes you stronger and wiser.