Hi, I'd like to help you with your question.
It is very difficult when there are problems in your marriage and your spouse is in denial. It strains the relationship and causes frustration.
Denial is a way of coping with something you find too painful to face. Your husband feels overwhelmed and is using his denial as a way to avoid dealing with his depression and the problems in your marriage. The addiction to computer games is part of the denial, in the form of escape. And the claim that no one knows more than he does is also a way of avoiding responsibility.
Talk with him about what is going on. But this time, mention that you know there are problems and that he knows as well. Tell him that you would like to help in solving the problems so he is not as burdened. See if he responds. Also offer to help him deal with the depression so he can feel better. If you try making it sound like you are together rather than he is responsible on his own, he may come around. You probably will have to do this more than once, but it is worth a try.
If that does not work, try telling him that you feel the marriage is in trouble and if he is not willing to work with you, you will find a solution on your own. You cannot be in this marriage by yourself. It takes two to work on problems and he his avoiding holding up his end of the relationship.
Go back into counseling yourself. This time, talk about solutions related to your situation. You may have to decide if you need to separate from your husband. Men usually assume that their wives will stay and that the problems they talk about are just complaints they have. But when they see that their wives are willing to walk out the door, they start paying attention. Counseling can help you decide if you are at that point.
Try self help as well. The more you know, the better you are able to handle what is going on. Here are some resources to help you:
Seven Principles for Making Marriage Work by John Gottman
How to Improve Your Marriage Without Talking About It by Patricia Love and Steven Stosny
Fighting for Your Marriage: A Deluxe Revised Edition of the Classic Best-seller for Enhancing Marriage and Preventing Divorce by Howard J. Markman, Scott M. Stanley and Susan L. Blumberg
You can find these books on Amazon.com or your local library may have them for you.
Although you cannot force your husband to work on the marriage, you can work on things from your end. Be supportive but also realize your limits. You need and deserve to have a husband that at least tries to work on his problems. And you can offer to help him, but if he won't accept help, you cannot force him.
I hope this has helped you,