Welcome Mag! Your ex sounds like a jerk. Just be glad he didn't fight to keep your children involved...it could have been MUCH worse than it is from reading some other stories on here of people who've lost the fight to keep their kids out of the Cult.
Your ex probably fought for your DFing so he could go back to having a prominent place in the organization and snag himself a self-hating "sister" who has no problem letting him exert his masculine authority with her.
Here's something I don't quite get...most of the time men who are domineering bring a lot of that over into the bedroom. But with JWs all you have is missionary postition...lol...so what real benefit do they get for being "THE MAN" in the house? Just the feeling of superiority? Doesn't seem worth the trouble to me. If I were to claim "superiority" best be sure I'd be demanding some things in the bedroom that the JWs don't allow.