Because people here are fucking stupid. The best arc of AGE is the first gen, by a gigantic margin, Fardain and all. Taken on its own, Gen 1 is a story of a cycle of revenge, Grodek unintentionally passing all his hatred onto Flit and turning him from a starry-eyed youth to a vengeful adult who will eventually age into a bitter old man. Even the Fardain arc, which people grumbled about endlessly while it was happening, has the payoff of giving the Diva the backup it needs for the final mission and mirrors the theme of the arc: it's a microcosm of what happens with Grodek and Flit, people passing their vendettas on across generations long past when anyone remembers the reasons why the fighting started. It's still full of shitty writing, but it's a cohesive story with a clear set of themes. I'd even go so far as to call it good, if I was in a good mood.
Gen 2, in addition to everything in >>17051877
, is an empty meandering arc where nothing happens. Do you remember what happened in Gen 2 other than the brain damage helmet and super pilot fight? I don't. They spent I think it was six fucking episodes in high school, and then they went to a bunch of places in space that had never been mentioned before and are never mentioned again, at some point they got the brain damage helmet, Asem killed twelve aces in one fight, and then the Vegans dropped a ship onto the Earth. Flit takes over the world and purges all the Vegan sympathizers, literally the next episode Flit's out of power and the Federation is full of Vegan sympathizers.
None of this meaningfully advances the overarching narrative, no significant character or setting development occurs that isn't wiped away by the timeskip, nothing. The only thing Gen 2 does is introduce Asem and Zeheart, who after the timeskip are entirely different people because of things that happened completely offscreen. It's a useless waste of space of an arc and by far the worst part of AGE in hindsight.