I'd tell him how you feel including that divorce is the only way you can think to handle this. Use I statements. Don't accuse him of anything while telling him how it's affecting you.
Fighting is emotionally exhausting. Fighting is not helping and so I'd refuse to fight.
Do you have any idea why he's not looking? Perhaps counseling would help him gain more confidence and courage. Also there are groups for those who are unemployed. I see one advertised in the paper that meets at the library. They provide support and give lessons in how to job hunt.
For your own sanity, stop expecting him to find work. Accept that he's not looking and stop asking him about what he's doing or commenting on what he's not doing. Find a way to accept him as he is while encouraging him to do specific things. Tell him you know it's hard to find a job and suggest that you'll focus more on helping him than criticizing him. Perhaps circle job opportunities in the paper. Find a group for the unemployed. Find a class at the junior college.
If he yells at your suggestions and won't go to counseling then my next step would be to plan a way to live on my own. There is no point living with someone who is not a part of the solution.
You may qualify for state aide. In your circumstances, I would only work 40 hours and get outside assistance.
After reading GrammaRocks, I suggest that you try to get him in to have physical exam. It's not likely but there may be a medical reason for his behavior. And I'd definitely consider that he's depressed and ask that he consider an antidepressant.