That's a pretty fine line. Butcher isn't the protagonist anyway, which is good because he's the weakest aspect of the story. He hurtles from one situation to another, bringing no resources of his own other than a generalized ill humor. Some CIA bureaucrat bails him out today, a long-lost aunt cheerfully abides the total destruction of her neighborhood tomorrow, a rando schlub turns into the James Bond/MacGuyver hybrid he needs next week. Plot armor is not meant for deuteragonists; Butcher should definitely have been killed off sometime in second season.