You are telling me that your husband never got what he wanted--a doctor, young wife due to deceit. That was jot a good way to start a marriage. He may very well resent this now. He doesn't love you or your family? Have you actually talked to him about this or have you decided this on your own? Men sometimes are verbally abusive and physical also to one they love. That is a poor way of showing it I know. You must get some communication going above all. If you can do this just between the two of you, great, but if not you must get him to talk to a therapist, or your spiritual leader who can help you to communicate. You really need a trained counselor to deal with two strong personalities who are doctors. Communications is the first key to solving any problem. He has already said he does not trust you.
You hate having sex with him which is understandable in a strained relataionship. Sex needs love to make it meaningful. Again a trained therapist could help. Right now you don't know really where you stand. It is amazing how some troubles marriages can to saved if two people want it to be so. The greatest concern is for your children. They love both of you. They don't want a divorce! Divorce is seen as the easy way out. If this is what you must do, I would not want you to stay in an unhappy relationship and be abused for your whole life. I would want you to on and get your divorce. However, that is the hardest on the children. A bit of work on your marriage could bring a lot of reward if two of you are willing. It wold help your brother who is in business with your husband. In the long run you must do what you must do.I hope he will work with you. If you don't find a solution your anger will continue to build and that spells bigger trouble.
Finally, whatever happens, you said you said you are attractive. You also have a Ph.D and there is a job out there somewhere. Don't give up. Persons who keep searching eventually find what they are looking for. Yes, it seems hopeless at times, but one cannot give in to depressing feelings. God bless you and yours.