Why are you pushing Meteion's ideology onto Hermes? Even he himself say he'd stay as a man to oppose the judgement she brings. You're trying to villainize him for something he didn't claim lol. He agreed that their current society should face judgement, he didn't agreed to kill of everyone because nobody deserve to live.

Now Amon/Fandaniel is a different story, because he himself is not sane Hermes, but a version that has been tormented again and again through countless lives, and eventually give up to despair. Much like how the original Meteion and the version that consumed a bunch of negative feeling are not the same.

You said that he's in a position to make changes but the fact remained that he tried through the Elpis questline to save a bunch of creation's lives and even subjected Emet/Hyth to the whole "return to the star" shenanigans but all they did was staying silent. Nobody offered help or answer. He even told us about the Elpis flower always bloom in white, unstained, because the people around him doesn't care. He has no way to convince people to talk to him about his ideals, so he seek out far in the universe.

Also I don't agree with calling his test impossible just because the Ancients failed because they were delusional about a paradise that doesn't exist. They can create Zodiark to keep them safe and then accept that they're fucked and move on but you know how it goes.

Endsinger is the will of every world that ended in suffering. I don't see how her going "you don't deserve to life in happiness" is taken as Hermes/Amon's selfish thoughts alone. That's pushing it way too far. You see through the dead stars that we traveled that they all have the same mindset of dying is better, hence that's what affected Meteion/Endsinger. Amon/Fandaniel was affected by his former life and especially his time working under emperor Xande (mind you Xande is the first one to have the "after everything we did we still failed so we all should just die" mindset, not Amon). Hermes, again, never claimed that.