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

[Absimiliard]

Even if we assume her intentions and convictions were altruistic, the action taken as a result of those convictions should not, under any circumstances, be portrayed as heroic. Whether the character suffered as a result of those actions is also largely irrelevant, given the sheer scope of the crime committed. In this instance, even had the writers successfully conveyed what they intended, I don't think I would be onboard. There is never a justifiable reason for robbing people of their future.

Choosing not to share the information she had on Discount Lunatic Pandora is already a fairly egregious action unto itself. Adding the sundering to that, well.. You can probably see why I'm not the biggest fan of how things are handled. I don't really have a problem with the Venat character itself, only the way the narrative continuously tries to frame the numerous awful things she did as being "for the good of all." The Scions and their allies could at least have had a WTF moment when faced with the truth, but we didn't even get that. The scant few people in the know just let it slide.