He sounds like a teenager who got his girlfriend pregnant.
I think that's very telling actually. And IMO you are right. He appears to have missed out on normal social and emotional development, which probably helps to somewhat explain some of his behavior.
Clearly he saw his unborn baby like a concert ticket he had purchased in advance, but decided he no longer wanted to go. Options, sell (divorce) or throw out. Sickeningly we know what option he chose.