I am not a fan of the mischaracterization of MC in the series or the seemingly totalitarian depiction of the UNSC or the overt uncompassionate psychopathic malevolence of Halsey. In the games, Master Chief is always in motion (when he is not in hyper sleep) and is always moving forward. He thinks quickly and never misses a step or stops too long to think about his own circumstances in service of humanity. The series turned him into an unaffected machine on a Robocop-esque journey of deprogramming and self-reflection while slowly recovering his humanity. Just not what people like myself, that have been fans and playing Halo since 2001, and reading the early novels really wanted or expected. The games always felt hopeful to me, because Master Chief never seems like he gets too introspective about the detriment of the world around him. He just keeps fighting selflessly for humanity and... Cortana. The series just feels so bleak to me. MC does not inspire hope in the show like he does in the games. In the games, you can see why everyone is inspired and rallies behind him and it would have been cool to see Blue Team together, but I am kind of glad they gave him a different squad for this series.
All that said, I am still trying to watch it and accept it as a separate sci-fi IP and story albeit with some familiar set pieces, named characters, and plot points. Also, I still want 1/6 figures of MC, Soren-066, and Silver Team.