Yeah, I can't stand him written that way. It makes me think that the author has stuck him permanently in first-year mode. I honestly expected to see "my father will hear about this" somewhere in the first few paragraphs. If a piece is going to be set post-war or anomalous future, where the characters are supposedly adults, then allow them to act like adults instead of children. He can be written as irritating and complaining without resorting to the type of descriptions that would be more appropriately applied to a tween in the middle of a past-bedtime tantrum.