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

[Turtledeluxe]

story is pushing a genocide

You are though, because you and others are very pushy about "call it genocide or nothing at all". Ypu know the reason you're asking for that isn't due to textbook definitions, it's because you want people to conform to your view. As far as the game, it doesn't really paint Venat as a flawless character nor does it suggest the sundering is perfect. Yes the game has general overtones of the guardians of light (which has a positive connotation) and yes traditionally Hydaelyn was viewed as the savior of the star-- the entire point of Shadowbringers and Endwalker was revealing that being a savior is significantly more complicated than that and perhapsyou maybe even get your hands very dirty in the process. Things are not black and white as you are painting them in real life or in the game. Yes the game has other instances where maybe it's asking you to make a moral decision, that is not relevant to the sundering.

I'm fine with JP version with her actions being regarded as necessary. We will never agree on this because you and others have elected the interpretation of the story that imo, makes no sense and doesn't work on any level. Which is to say, you seem to think the trip to Elpis offerred some chance to change the future. I don't agree. I think the Elpis trip resulted in a time convergence where everyone got on the same page in the present time (Venat specifically calls this out). The past timeline still occurred-- past Venat did not have the information and no amount of Elpis visits is going to change that. We also don't agree that she "did nothing to stop it". The walk seq. clearly shows us she made attempts to convince people to not summon, and they ignored her. We literally worked with her to try to apprehend Hermes and it failed.

story was ultimately written.

I've already said the story isn't ideal but I attribute it to being nearly impossible given how big the story is and how many plot threads had to be resolved, how gameplay has to be involved given it's a game, etc. For example we could've discovered the secrets of Elpis through a scroll, no time travel. Makes more sense, takes less effort, solves lots of problems, but it's boring and doesn't serve the gameplay. Yes the story has missed opportunities as with the Nier crossover.

Is that not exactly what happened during the course of SHB and EW both, though?

I'm so glad you asked because yes, to a degree this is true. But to clarify, there's a huge difference between solving some problems (ie now we know how to reach Meteion, now we know what dynamis is , etc ) and being equipped to deal with the future vs knowing the future and just preventing it. What if we apprehended Hermes? What if Venat stopped him? What would that even mean for the present time of the game? It creates all sorts of problems and for what? So you can regard Venat as more logical?