If you're a younger Millennial, there isn't that much of a difference between you and (older) Zoomers.
If you're an older Millennial, then it is beyond pathetic to be emotionally invested in Generation WarsTM with kids who are, at the absolute oldest, less than three years out of college.
The first paragraph goes some way to explaining the issue raised in the second paragraph. Creating and persisting with these arbitrary categories (to the extent that they become identities in themselves) is bound to create conflict. It's particularly silly as there are in some cases bigger differences
within these categories than between them.
Incidentally, here's something that kind of relates to this. On certain dating apps I've noticed that some people have a bizarre and very specific age range preference. Not a round number (which is silly enough in itself IMO) but, for example, someone who is 33 might have 31-34 as their age range. Does that mean someone who is going to turn 35 next week will then be out of the question, and does a 30 year-old whose birthday isn't until next week need to wait until then to message this person? Plenty of people are 'younger' or 'older', by a little bit or by a significant amount, in terms of their personality, looks, health etc. In adulthood, those factors and others are more important, surely, in determining whether a relationship or friendship will work.