I also suffer from depression and attempted suicide last June. I am a lot better now because of 2 things. One, I take my meds as instructed. Secondly, I pray, and pray alot asking for Jesus to help me. You sound like me and I also had a terrible childhood and many of us on this site have also had poor childhoods, with abuse and things like that. I too felt I had no hope. And I also brought this thinking in my marriage.
My W used to try and help me in some ways, but in other ways, she was very controlling which made the situation even worse.
Its a waste of energy for you to be angry, I know, I speek from experience. You need to stop being angry with yourself and your husband. Most important, do not be angry at God. The situation you are in is not something that God wills, but the devil enjoys. The devil is laughing at you and at me but I have prayed alot and have made many changes within myself because I only have control to change me, no one else. Don't let Satan win because that is what he wants.
I think you are fortunate that your husband has made some changes since January and you said so yourself that he has become the kind of man any women would be thrilled to have as a husband. I have made many changes too and my wife is treating me the way you are treating your husband. Your husband feels horrible about his past decisions so he is sorry.
You need to forgive your husband and I only wish someone would tell that to my wife. If we are truly sorry, everybody deserves to be forgiven the way Christ forgives us. If you do not forgive, Jesus will not forgive you and then what will happen to your eternal soul?
You say you are stuck and that is because you choose to be stuck. Let go of it. God loves us all and please pray often and give to God all your worries and heartaches. Believe me, God can do anything, nothing is impossible for God.
