It sounds like you have had a lot of losses: loss of community, loss of friends, loss of job, loss of a pregnancy, and loss of a relationship. That's an awful lot to handle in a very short period of time and it's no surprise that you are in pain.
You're feeling kind of powerless - powerless to help him with his job hunt, powerless to stay home as you had hoped yet powerless to get a good job and readjust to the working world, and powerless to cheer him up or share feelings. He's powerless too - powerless to get a job, powerless to change things or to accept responsibility (it's God's fault), powerless to move forward from the computer to the world.
It also sounds to me like you two don't know how to fight fair! There are rude comments and nagging, or at least that's what it seems like to the recipient. I really think you could benefit from come counseling, maybe individually and maybe as a couple. You care more about him than yourself, you say, and he doesn't care enough about himself to make his own life better. I'm not sure what you mean by "I can never ever dream of being a SAHM" - is that because you can't see it happening with him, or because you are sad about losing your pregnancy, or because you think you may never have a child? You are grieving, and you are asking yourself to carry a huge burden all by yourself.
You have been in this situation for 6 months, and while that sometimes seems like an eternity, in many ways it's just a short period of time. I think you both need some help to get out of the rut and the negative behaviors.
Please, call your primary care physician for a referral to a couples therapist. It might be that you each need to see someone separately, but it will help you get some clarity on what YOU want, and it will help him get clearer on what HE wants, and then you need to learn the skills to really reach the other one during conversation so it doesn't dissolve into rude comments or other non-productive techniques.
Whether this marriage lasts or not, you will not be able to move on (either with him or with someone else) until you resolve these issues. You're carrying a heavy load - share it with an objective professional who can help you sort things out.