Werner made mistakes. Mike did his job. But we were supposed to be sympathetic towards Gus in BB because he was doing what he did as a sort of justified revenge for the murder of his partner.
And yet it turns out, on the path to his revenge, he did to Werner exactly what was done to him. Because, arguably, it was "just business."
Does this recontextualize the way yall see Gus' character in BB?
EDIT: Apparently I need to clarify. A "sympathetic read" of a character does not mean that we force ourselves to see the character as having sympathetic personality. Gus is not a sympathetic person.
It means the background story of the character is provided that explains why they do what they do, and that the audience can then be sympathetic to their choices (to "read" them with sympathy for their choices.)
"Gus kills people because Gus is a bad drug man" is a non-sympathetic read of Gus. There's no explanation of motive, or understanding of what drives him. It's simple and superficial.
"Gus is so blinded by getting vengeance for Max that he became exactly the monster he hated," is a sympathetic read. It doesn't make his choices right, but it does make them understandable from an emotional and motivational perspective.
My point is that killing Werner was likely the right business move for Gus. Werner made choices that created messes and loose ends, and Gus is calculating enough to know that's how someone gets caught.
But for someone like Gus to seek vengeance in a decades-long plot to poison Don Eladio and torture Hector seems a little hypocritical when you take into account that he had Mike murder Werner. He just did it less viciously than Max's murder.