Welcome, Arlie.
You are facing reality, that's all, and there is no reason to feel any guilt about that, though the alcoholic would be very pleased to know you were. In recovery we have an acronym for how we can be manipulated by alcoholics: F.O.G. (fear--obligation--guilt).
You have "zero want" to work things out with him because you have faced reality and accepted that working things out with him is impossible. It is impossible.
He is still committed to drinking and to defending his drinking and to shifting blame to you for any number of meaningless things you do or are in order to make himself feel superior to you and to deflect attention from the core reason your marriage is a failure. Alcoholics are inflated, grandiose. It is always somebody else's fault, issue, or shortcoming. And they have an uncanny ability to convince others they are right.
There is nothing you can do, Arlie. He is incapable of rebuilding the marriage as an equal partner because he is not sober. Period. Reality. Counseling sessions together are futile as long as he is an active alcoholic.
Your child is more important than he is. Your child is helpless to make a safe and secure and sane home and deserves one. He's had his chance at life. He's an adult who's had every chance to make choices which were either about maturing or about escaping. So he doesn't get a vote anymore. The child comes first. Let him live the lifestyle he chooses and you can pull yourself up with dignity and build a safe and healthy life for your child. Do not let him talk you out of that noble undertaking.