It just reeks to me of him being jealous of people who don’t have kids and/or him regretting being a parent?

Perhaps. I don’t think there’s much here to substantiate that reading though, even with the context. I’d want a bit more evidence if I were to incorporate that into my appraisal of him.

You can judge someone to be morally repugnant without interpreting everything they say/do as an extension of the things that make them repugnant. It doesn’t lessen the repugnance.