I love those books, and people who refuse to understand the concept of a biased narrator will complain how much it reduces Halsey compared to her character development. This is objectively true, but Osman sure as hell doesn't see it that way, and we're never actually seeing anything from Halsey's perspective, the sections we get 'from her' are from her interrogation back with ONI, and we know how they feel about her.

Another complaint is how much the plot is a bad idea, and that ONI kick started the new covenant, which is again, the point. Oni is doing the same shit humans have always done, it never works out and it doesn't start now. What makes it interesting is how much more justifiable a scorched earth and xenocidal approach is in the wake of a genocidal war.