I would have loved to see more of that internal conflict in any shape of form in ShB, but he was truly delirious and mad to the bitter end even if you could understand his motives, that's how he was portrayed to me.

He is so similar to Solas from Dragon Age, whom I detest, but at least Solas is very clearly shown to be remorseful for having to essentially destroy the world as it is to get his people back. And the entirety of the game you can make it very, very clear to him through your own heroic actions that perhaps his opinions on mankind being massively flawed, incomplete beings, are unfounded. But Emet really gives me nothing, even in our final encounter with him in Endwalker, he seems more or less convinced that would he be living and breathing, he would continue where he left off in ShB. His values, his beloved past, all greater things than our failure of existence. But not to completely rag on him, he does give us a little bit of credit for what we have accomplished so... there's that.