I am sure you know that it will need both of you to work towards bettering your marriage and your relationship. It is equally important for your husband to put effort in salvaging what is needed and making the correct adjustments for the sake of your marriage.
You should not give up, and try to find alternative ways to bring him towards taking these steps. Maybe you can speak to a scholar he knows, or an elder who he respects, etc...
I have a Ramadhan series as well, called "save your marriage, save the world". Each episode deals with a different topic. In shaa Allah it will be beneficial for you and your spouse.