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

[CrownySuccubus]

I was squinting hard at Hien the second his introductory plotline amounted to "I am going to take advantage of these people (who saved my life and sheltered me for years, btw) and their culture and manipulate them into being footsoldiers for my war that they have no involvement in because there's a loophole in their ritual to claim power lol!" and this was treated with completely uncritical positivity.

I'm going to admit that I completely overlooked all of that.

Probably because my vision was obscured by the giant hearts appearing in front of my eyes whenever Sadu Heavensflame was onscreen.

It did not get much better after that, especially the Yotsuyu stuff.

I'm curious to know your exact objections to the Yotsuyu plotline.