An abusive home is a broken home. A home where all its members are safe from abuse is not broken.
You sound courageous to me - to have made that decision, gone through with it, stood your ground, and with all of the fallout you've had to face.
You ever read Freedom Flowers? It goes with the main Freedom Programme book and looks in more detail at the damage caused to children in abusive environments.
You protected them from the abuse in the only way you could have done. The only person whose fault it is that you had to do that is his for being abusive.
It sounds like you still struggle to appreciate how abusive he was to you? The way his family turned on you was part of that.
I wonder if you'd find it easier to let all this guilt go if you went on the Freedom Programme. Would you consider it? It's not therapy, just information. You don't have to share your own story, you can just listen. And it sounds like it could be information that would be really valuable to you.
Www.freedomprogramme.co.uk
Take care.