@Words Of Wisdom Well, if you consider that he knows he's one of the last chances humanity has got, and still his father(the only family he really has left) thinks of him as a mere tool, maybe a real 14 year old might be angst-ridden As for the temper tantrum, thats after he has killed a human being for the first time. now i dont know how a "real" 14 yr old would react to that, but im willing to take a guess that neither do you
Go ask Soriku then. He'd be more likely to go "lol wut?" then go batshit insane though.
Overall, the show was a disappointment as Shinji never grew out of the little sack of angst he started as.