I'm quite surprised 1/4 of voters think you are NOT being unreasonable.
That's coming from someone who never did 'Elf on a Shelf', who likes to leave some sherry out for the big man as I prefer knocking back a glass of sherry to a glass of milk , and who calls him Father Christmas.
I, like you, OP, am probably older than average posters on MN, but I am more than happy for traditions to evolve, and for new traditions to develop. You don't have to adopt anything you don't want to. In the same way our adult dc can adopt (or adapt) things they want to.
But there are plenty of traditional things from my childhood that we still do - including Carol services and Nativity services, stockings including an orange and some chocolate coins, decorating the tree together whilst listening to Christmas music, and piling on all the old decorations which all have some history to them, but also adding in the new things as life evolves. We do loads of things that I did as a child, but then, when dh and I got together, there was obviously some merging of traditions from 2 different families and creating our own, and now my adult dc have partners, they will merge both of their family traditions and create their own.
YABVU.