The fact that you are saying he is now depresed worries me. I cant judge you or him without knowing you guys but I was raised in such families. My mother did everything any human could do to get my father to work but it never worked. When I was very young he had a business. All I remember abt it, is people coming to the shop saying he is at some drinking place and is asking for cash. Envuntually the business went under. My mother put her hard earned cash into the business tryng to revive it but it never survived his drinking. Then my mother would spend money on trainings and start up businesses for him which never materialised. The only thing that was interesting to his was his drinking. I guess he was never always like that otherwise I believe my mom wouldnt have married him cause she is a smart and strong woman. I love her with all my heart but I still cant find it in me to forgive her for staying in that marriage. She keeps saying it was because she didnt want us to grow up without a father. This is why I hate these F4J crap cause sometimes its better for the children to grow up without one. One of my child would memories is of the day that he came back from his drinking binj in the early hours of the morning. he left his car at the gate, come in a beat all of us up including my mother bcoz she tried to stop him. The reason for this beating was because we did not wake up to go open the gate for him. Then when we opened the gate, my mother was lying on the drive way from the beating, he almost drove over her becasue "she is stpid woman who thiks is all that because she is making money."
Like I say, she stayed she is still with him, but it would have done me as the only daughter a lot of good if she had left. I now have a father that I have to smile to and buy birthday gifts for that deep down I dispise with every born in my body. I do this because she would be too hurt if I did would I would like to do to him, which is killing him really.
While on the other hand if she had left, i would have spent my life idiolising him and visiting him sometime but not staying long enough to know how terrible he really is. I would have been a happy daughter in my view. I also think, if he didnt have her to buy homes and cars he would have found himself a job because he would have ended up homeless and the way I see him, he likes the high life and wouldnt dare have it in otherway.
So I am not telling you what you must do, but sometimes man are just that man.