Well, you have got a point there about complaints. But I don't think his actions led to anybody's death. It was the lunatic's, Anett's, actions that did. As I recall it, he was against having insane operators included in their ranks. "Keep an eye on somebody" in the middle of a battle is an inane command in any case. Somebody who needs such special treatment isn't supposed to be there in the first place, so it was in fact Iris's own fault for not kicking the mad one out.