My STBEXH also blamed MN for putting ideas into my head. You are all a pack of miserable bitches according to him.
This was when I found out he was trying to cheat again on sex sites and came here for advice then showed him the thread via a link.
I think some men are very threatened by women having voice especially when they call out bad behaviour that the abuser tries to keep secret.
It's strange how they were right and even though I sacrificed a lot to tell him not to come back when he flounced out (expecting me to beg him to come back) I'm truly happy now living alone with a DP in my life who makes me happy.
MN gave me the strength to do it alone.
You haven't lost, and they haven't won. You've just decided on a different way to live your life.
You need good legal advice as others have said.
You aren't in a settled place at the moment but that will change when you move. He'll have to step up and make time alone for his dc, every other weekend he'll have to care for them alone, regardless of harvest or milking, or lambing season, and then he'll realise how well looked after he was. He'll have to reduce his time on the farm to do this, and then the family will also realise this.
Ignore them, when you move they can't hurt you anymore. If they try it will be a more obvious vindictive act than the stealth way they do it now.
If they had mouth you to your DC then they lose contact with their GDC.
Sorry to hear what happened with your dad. 