Yeah I was guilt tripped too - about leaving the JWs. A friend wrote me an email about how my kids were going to die in Armageddon...I think that's pretty much the "norm". Depending on what culture you're from, emotional blackmail and guilt tripping is pretty common too!
When I divorced I decided to do so because it was in my best interest and my children's best interest. There are always going to be some well meaning people who try to persuade you that staying together is in the best interest of your kids (even non jws). Only you know your circumstances and from what you've posted it seems like you have a good grasp of things. Here's the thing about those type of decisions...you are the one who lives with the consequences - not them. You are the one at home with a husband who has issues and kids that are growing up in that environment thinking that's normal.
You have this great opportunity to create a life that you want and expose your kids to something different..something better... Don't second guess yourself and try to surround yourself with people who can be supportive. Some people just can't unless they agree with your decision. Take everyone out of the equation and ask yourself "what do I want to do?" and then stick to it!