Originally Posted by
Kordarion
Or perhaps its as simple as having both expansions being presented from a different point of view. Shadowbringers was in many ways the expansion that allowed for Emet-Selch and by extension the ascians to provide their side of the story, their belief around what happened, same as Endwalker is Venat/Hydaelyn's turn to speak her truth of events. Neither Emet-Selch or Venat are, realistically speaking, reliable narrators as both have their own agendas and goals that they want to see happen. The closest thing to we get to a reliable narrator in Shadowbringers is in the Amanesis Anyder cutscenes, and even then they come from Emet-Selch's daydream of Amourot. The first time we got any concrete proof of what ancient society was like was in Elpis where we actually interacted with their society in its true state.
If that explanation doesn't suffice for you I have another idea of why the portrayals are different, there are multiple mentions in Endwalker about a confluence of our present time and the ancient world's time, what if the stable time loop we are in wasn't as perfect as originally planned? When we first speak with Hydaelyn after completing the Aitiascope it sounds as if she had never met us in person before then, despite us having met her in Elpis. At the end of Elpis Venat also mentions the possibility of our actions having created an alternate timeline that could fuse back into our own. Therefore it could be possible that the Venat we see in Shadowbringers is a Venat that never encountered us in Elpis and as such lacked knowledge of the future, it can also explain how Elidibus isn't sure he saw us in the past, he could be confused because he has memories of both timelines due to the new one being made but not yet re-joined.
And Meteion could still have ended up becoming the Endsinger because she still would have received the report from her sister regardless of our involvement and still run off to hide from Hermes where the knowledge she gained would still drive her to desire the end of all life.
The pot calling the kettle black, both sides are guilty of bringing it up in places where it is not relevant and going tit for tat in who loathes who isn't good for a healthy conversation but from what I have seen in the last few days it is the 'we loathe Venat' group who starts a lot of these revolving door arguments by being the first to voice their complaints. You and Veloran are prime examples of this.