What's the point with that quite lackluster story in Endwalker?

[Quuoooote]

Despite Dynamis being the key that is allegedly everywhere, undetectable, and more abundant than the much-stronger Aether, we never actually really learn how to manipulate it. The Sundered never feel as though they're more equipped to deal with the issue of Meteion other than being told "you just are", and ironically they are presented as much weaker than their Unsundered counterparts. The aetherical density of the Ancients provides them innate resistance to the Dynamis / blasphemy-inducing effects of Meteion's song, but the Endsong easily smothers and snuffs out the aether of the Sundered, resulting in complete and total soul erasure. Go, suffering.

Side tangent—if Hermes was memory wiped and willing to help the Ancients from the seat of Fandaniel, he should have still known about his Meteions, unless he had come up with the concept during his lunch break while we were in Elpis and sent out a few thousand in that time alone. Additionally, as an expert in Dynamis, he probably could have, should have, would have been able to do something about the Endsong if he were sincerely trying to help. The story even explicitly states that he and Venat were the ones to deduce that the aetherically-weaker portions of Etheirys' atmosphere were what the Endsong 'broke through' to affect the Ancients, yet Hermes could neither identify it nor come up with a solution. This has the added benefit of making the Venat situation so much worse morally speaking, since she knows the Metia are singing the song of oblivion and knows about Dynamis, yet still says nothing and simply allows the Final Days to happen. Geez, there are really too many side-tangents to choose from when talking about Endwalker, doesn't that speak volumes about the quality of the story?

Ultimately the time loop causes all of this and ruins everything, especially Venat's character, because she must remain silent despite everything and have all agency stripped from her character in order to propagate causality. The WoL has no agency, because they must travel back in time to set the wheels in motion. Never endingly, with no true freedom of choice in sight: all roads lead to the time loop.

EDIT Because we fact check ourselves after posting: Venat isn't actually stated to have assisted Hermes with the whole atmosphere thing, but it doesn't change the fact that she knew all the information necessary to come to the same conclusion anyways. She knew it was Dynamis, she knew it was Meteion's song, she knows the Final Days are going to be an apocalypse level event, but still says nothing.