Is a marked lack of maturity in an adult the result of nature or nurture?

The kind where “compromise” isn’t even in their vocabulary.

The kind who pouts, or exhibits passive aggressive behavior, if they don’t get their way.

Someone who gets defensive and angry if someone else asks them to change some small way of doing something, for the other person’s convenience, like putting things away when they’re done with them. They see it as a major criticism of themselves and the way they were doing it before, instead of what it really is, which is just a “please and thank you” request. Or they may see it as being “treated like a child.”

Someone who is very quick to point out other’s perceived faults or behaviors, while oblivious to, or justifying their own, even more egregious behaviors.

Is that due to DNA, or uninformed, lax parenting?