I don’t think you can stop cruelty through cruelty. Veganism is about acknowledging every individual and abstaining from exploitation and cruelty towards them. It’s not some sort of utilitarian philosophy where it’s ok sacrifice a small number of individuals for the good of a larger group.
As in you didn’t like Black Flag, or that was the last one you did? I’m currently replaying it for the first time since it came out and it’s alright so far. I completely forgot everything from the story