To echo another poster, I am not sure you know what a millennial is (unless you're a troll). And if you do, these individuals are likely anecdotal. I was born in 1987, which is coincidentally when one of my favorite action/sci-fi movies came out. Hint: it starred Arnold Schwarzenegger. Growing up in the 1990's, all we watched were 80's action movies and early 1990's flicks....because um, you know, it was, like 1997 and what else were we going to watch? Yes we saw some movies from the 1970's. Just not as good to us. We were kids. I have a 22-year-old co-worker who said he doesn't watch movies from that era because "they're old." Too bad for you. See, it's not so much a generational things ("Oh those stupid millennials/Gen z"), it's a youth thing.
Just spewing more nonsense and hate on anyone younger than yourself. I'm 34 and not into social media but it doesn't bother me if a teenager is spending four hours a day on tiktok. You do you, bucko.