I dislike that a) it's considered binary, while the vast majority of people will not be even close to either extreme b) people put themselves into those extremes anyway, throw around the wildest (and mostly useless) definitions of what "being an introvert" is supposed to mean, more often than not dripping with victim mentality c) people use their supposed status akin to a neurodiversity d) people openly blaming others for not being allowed to be like they are because others dare to be like they are ("I have it so hard in life because I'm an introvert in a world full of extroverts") e) people define large chunks of themselves around some label they largely defined themselves and want this label to be respected as if it was a real thing, an illness almost. f) people define large chunks of themselves around some label that is just meant to very loosely describe some aspect of a human being's character, not the whole human