Remember when we talked about learning to be a parent. He's never been the kind of parent he's expected to be right now. I don't think you made that happen or he made it happen, circumstances were what they were.
I know it's tough to watch your kids hurting but what if you bring it up now and then in 3-6 weeks he backslides and then you're frustrated again and then the cycle repeats. He needs to be driven from inside to do what he needs to do. It may take awhile or it may never happen but you reminding him won't do it.
Make space for it to happen but let him own his problem.
Have no expectations.
Hang in there.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss