In terms of actual decisions the movie made that made me angry, there was only one. Unfortunately, that was within the first 10 minutes, where we discover young Georgiou became emperor due to winning some sort of Hunger-Games-like competition against 17 other kids.
This is, frankly, totally nutso. It completely goes against everything we saw previously involving the Terran Empire, where the way to the top is murdering all of your rivals until your will to power is respected. Yet we were meant to believe the Empire was just going to hand over total power to teenage Georgiou, just because she happened to win a contest? Made the whole Terran Empire seem small and fake.
The worst part is, this wasn't needed. The scene could have worked just as well if it was just a contest to get into the Terran Empire's equivalent of the officer corps, setting Georgiou on the path to tyranny rather than just achieving all of her aims in a single moment. In fact, I'm guessing that was what a rough draft of the original season arc had planned here. San could have been at her side as her personal slave for decades as she ascended the rungs of the Terran Empire, slowly losing all humanity. I even think it wouldn't need more than a single additional scene to work.