Endwalker's story had me, but lost me. Ethical issues especially (spoilers)

[Veloran]

I think this kinda sums up how I feel to some degree. I liked Venat a lot of first when Elpis first started, but afterwards I grew to dislike her actions.

Well, for all intents and purposes she was supporting the instigator of the apocalypse (Hermes) with her inaction. He himself says that if the others retained their memories they would have the advantage and it wouldn't be a "fair" contest, so Venat not telling anyone or doing anything was just going along with his plan. If it had just been a branching timeline or she too had lost her memories this wouldn't even be an issue.