As an older Gen-X, I get that. Outside of generation labeling being too generic, like astrology as mentioned, the problem is that it focuses on the birth date and not the times of childhood. Older Gen-X grew up in the 70s with its particular influences and teen years in the 80s while the other side saw more late 80s-90s while being a kid. Same "generation", but totally different take on things. And likewise can be done for any of the others. And the label "millennial" is now so broad it doesn't even apply to the original group, as it's used as a negative towards teens now when the actual millennials are 30s and parents and potential grandparents already.

It's a classification that worked once because of hard dividing lines, but now is blurred and overmarketed.