Six months sober is almost nothing in the grand scheme of things.
I know I believed I was TERRIBLY wronged by my alcoholic parents. They never seemed to see any of it, or accept much in the way of blame.
Today, I see my parents VERY much differently. I know they did the best they could with what they knew AND they gave me more than they ever had. I love them very much.
Perhaps it will take reading that book for your son to understand what he DOES have to be grateful for.... and besides, my sponsor always tellsm what other people think of me.... is none of my business.
Hope today goes better.