Self doubt during times of unemployment are normal. Been there done that.
But it sounds off that he doesn't value support during this time. He wants to be alone and wallow in his self pity. And he wants to be seen as the smart, courageous, breadwinner. Be careful of where and what he values women as. It doesn't sound like partner is the position he has in mind.
Then there is the child thing. He may seriously want to have a son, I bet he is thinking son, while he is young enough to be active with him. If the kid is born when he is thirty, he will be 40 when the kid is ten. Every person under 30 knows that death occurs shortly after 40. Anyway, he may know that you are in less of a rush and wants the freedom to look for someone more ready to get pregnant.
Marriage. I tend to be more in his side on this one. I don't know that the government created it, but is does keep lawyers in full employment. If all else were going well, he might agree, but all is not going well.
I say to look around. There may be a better choice for you just standing around.