That... sounds like it might translate to "yeah, it's been a lot".

[He's sorry to call you out, Dedue, but... y'know, maybe take it as a compliment that Grant's comfortable enough to do that to begin with?]

Aah, yeah; I ran into her, too. She... sure seems to be enjoying the opportunity to make herself known.

[...He laughs again. Audibly dry this time.] I... yes. I am. Brought it on myself, though, I... keep tryin' to reason with Pokemon who are entirely uninterested in being reasoned with.