Now that we know your DH is wealthier than you OP, I'd go full steam ahead for a divorce. What have you got to lose? Your parents have already disinherited you, which has naturally hurt you deeply. Therefore you no longer have to take their opinions on ANYTHING into account, because as you've said yourself, it feels like they don't care about you, so why should you care what they have to say.
Would your share of the marital assets be sufficient to set you and your children up in a place of your own, or would you struggle to do this if you walked away from your DH? Please note: I'm not saying you shouldn't do this, not for a moment, but would just like to know how difficult or otherwise, it might be for you, so that we can offer advice accordingly.
To me, it sounds like it's time for you to stand on your own two feet, take what I know will seem like a gigantic and scary step, and walk away from both your parents and your husband. Stop letting other people control your life, believe me, as an older person myself, life goes past way too quickly to waste even a minute. So in MN parlance, start getting your ducks in a row, and show them all that you're worth so much more than the way you're being treated. I bet if you do this, in 5 years time, you'll look back, and be so glad that you decided to live your life for YOU, instead of living by other people's rules.