[The thing about being the new arrival is that the older Akechi has no reason to think that this younger him doesn't have the Call of Chaos. Though he notes the edge... Well.]

I didn't have time to be frustrated, at the beginning. The first few days were... Well, imagine a dangerous Palace on maximum alert and the Shadows are stronger than you and can't be reasoned with. That's about what it was like.

[In other words, he was too busy fighting for his life to register frustration in particular. It was all just a blur of terror and stress, so there's a fairly equal edge to his voice as he talks about it - a memory that hasn't been entirely dulled by time.]