I think that's sort of the point, in two ways. First of course, Persona at its core is just about the trials of self-discovery and maturation, so teenage everyday drama taken to 11 (ie anime) is just going to be a part of that. But Persona 2 in particular has something else going on. The layers of hi-bye character appearances in IS for the Persona 1 cast, the EP PCs, and so on lead me to think that it was always planned to be two games, right? So really, IS is an incomplete story told from the perspective of a teenager. One where his give no shits, loner attitude has all the women falling over him, where he's the only one who can save teh world, where his friendships and happiness as equal to the whole rest of the world. Then in Eternal Punishment, we see a more mature and objective perspective, a troubled kid flailing while trying to do the right thing and needing guidance to get through. And similarly, we start out assaulted by the mundane concerns of the teenage cast, then move past that into more mature fears and tribulations, but unlike the last game, we move past that yet again into the real heart of the matter, the darkness in everyone's souls.
Or I'm reading way too much into it. I dunno. It's fun to talk Persona.