Verbal Abuse and PTSD

We've been married 6 years. We have 4 year old and 8 week old twins. I have stayed home the past 12 weeks on maternity leave and will be returning to my full time job at a college (my husband also rags on the money I make, but that's another issue). My husband owns his own business, works long hours, and comes home and works even more. I am caring for the kids 24/7 and taking care of the house. Is my house dirty? Yes. Do I barely get dinner on the table (and sometimes it is a freezer meal)? Yes again.

Do I not spend all day with three kids - two of which are breastfeeding? Do I not wake up multiple times a night to deal with the twins? Husband can't be bothered with night feedings as "he has to work the next day and can't be tired."

We have gone once to therapy which was good for my husband as therapist pointed out that my dear husband plays a role in the problems and is not 100% perfect (which he thinks he is).

Here's the thing - I love him. I don't want to divorce him, but I don't know how to get him to stop. He calls me a fing b word all the time and in front of our 4 year old. He is constantly blaming me for problems. Yelling and screaming (basically throwing a tantrum) in front of our children. He never helps with the kids - the one time he had the kids by himself, he made me come back home after an hour because the babies were crying - yet he says I'm lazy and does nothing all day.

Anyone else experienced this? How do you deal?