She doesn't hate Chief. She thinks he'll come around to it. She thinks that perfect peace is worth it, but she's ignoring the casualties of her actions. Blue team brings this up with Chief. Chief tells her that she's trying to improve people without giving them a choice - like what Halsey did to him. Cortana doesn't listen, basically. The main "bosses" you fight, are the same dude with tons of bodies. He guards the Guardians/Cortana. He wants to prevent Chief from getting to Cortana, and Cortana does not want him to kill Chief. So they argue. But yeah this Warden Eternal has a bunch of bodies. You fight one at once, then later two at once, then in the hardest fucking fight ever 3 at once without much cover at all. Absolutely brutal fight. Cortana also sounds different a bit. More robotic than she used to. However, she might also be in physical form now. Early in the game it's referenced she will be able to eventually, and near the end she seems to be glowing, but then the glowing parts fade - almost like they were a shield rather than her normal body details. Apparently, Locke was an assassin who once came up with a plan to kill Arbiter until "things changed". So I wonder if in Halo 6 Locke is sent to kill Cortana, and Chief wants to not only prevent that, but stop her actions too. Definitely reminds me of Halo 2's cliffhanger ending, not so much as it interrupts the story midway ,but really not much was resolved haha, and it feels like it was all a leadup to next game.
*No one on Blue Team or Osiris dies
Interesting if true. Could be an interesting new faction for SOTPs.