There's things I don't like about Gen Z, but most of it I understand the reason behind it. The not liking rock music thing is too bizarre though. Everyone liked rock music. If you were in grade school in the 2000s, you were liking music from the 70s, Pink Floyd, Led Zeppelin - through the 90s.
It seemed like every generation appreciated rock.
But I've heard that Gen Z does not like rock music. I don't get it. To me that's like "not liking apple pie"; it's such an American cornerstone that it's baffling.
My dad was big into blues, but I always bounced off it when he tried to evangelize for it to my teenage self. I appreciate it more now, but I didn't really give it much of a chance until deep into the second half of my 20s.
I think in your teenage years you're always looking at the new stuff more favorably because with the new stuff there's room to stake a claim that it's "yours", rather than living in another generation's shadow. And that search for independence isn't a bad thing itself even if ot does lead to reinventing the wheel as a shitty square occasionally. Plus it's a means of staying relatable to your peers so to be bucking the trends there's an element of either embracing the sigma lifestyle or being extremely persuasive in your tastes.
Another thing that might be kind of hurting the appeal of rock specifically is teenage music taste tend to be start out pretty tacky and simplistic, but when people start recommending rock they start recommending classics from like the 60s, or super complex prog rock from the 80s 90s. Everyone has shit on the basic bitch pop-rock gateway drugs like Nickleback or U2 or Linkin Park so much that they don't get mentioned, so the easy listening stuff gets ignored and the taste never gets acquired.
Also it might have something to do generational zeitgeist, rock is supposed to be showy and egdy rebelling against the socially conservative eras, but that might seem rather quaint if not cringe by jaded Gen z who grew up with the internet in the gayest/liberal age, where the sjw weirdos already took the "edgy" aesthetics and the famous rock bands are old men saying the same boomer shits as the mainstream media. What is left to rebel against?