I'm an Xennial dad whose kiddo was born when I was in my mid-30s. Now at some level, I certainly identify with a lot of the stuff in this trailer, but I dunno, it also kinda feels like Gen X moving into the ~~thoughtless~~ (Edit: Let's say, "occasionally pandering" instead) "yay for people our age!" generational comedies that the Greatest Generation (Grumpy Old Men, etc.) and Boomers (Meet the Parents, etc.) loved so much.
I am imagining that by the end of the movie, Bill Burr will have a reckoning that he can't continue to rage (at least not quite so earnestly) against the changing of the world for his son's sake, but one or more younger parents will realize there is some value in his old school tough approach. Meanwhile, we get a trailer's worth of the no-BS old guys laying hilarious truth bombs on the overly soft young people that actual Millennials and especially Gen-Z'ers will find to be tedious stereotypes.