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

[Lauront]

I thought this was incredibly good visual storytelling. In the first phase, she's cool, calm, detached, and collected.

This totally changes in the second stage. She's panicking at that point. She's the sum total of the despair of all those civilizations. They confronted their ends and couldn't handle it. She says things like "We can't suffer that again". She's flailing out like that because she's scared. I saw someone mention the meaning of her attacks before, too. Telos apparently means purpose. Telomania means obsession with purpose. You're going to cause the universe to live on and there will be more pain and suffering and she's desperate to stop you.

Telos means the same as "end" and can be used in a similar manner, either to denote purpose (e.g. in a word like teleological) or end in the usual sense (hence, Telophoroi.)