I think the basic premise of your question is kind of flawed.
Generational age brackets are always a little fuzzy, but most definitions tend to define millennials as people born from about 1981-1996
Which means come the end of the 90’s, the oldest millennials were just turning 18, the youngest were just entering preschool, the “average” millennial would have been about 10. Personally, I was 8 in 1999.
So most of us weren’t exactly politically-aware in the 90s, let alone actively criticizing anything besides homework. And a lot of us probably had parents who wouldn’t have let us listen to RATM because of the parental advisory sticker on their albums.
My main concerns at the time were things like video games and cartoons
Then right around the time we started to be old enough to really form political opinions, 9/11 happened and the world went insane around us.
I’m pretty much in the same boat, 720p looks fine to me in the vast majority of cases, and while I’m not great at going to my eye doctor regularly, the last time I had my vision checked it was fine, and it was right around the time I was shopping for a new TV and upgraded from 1080 to 4k, and still had a 720p in my bedroom.
If I looked really hard at them, I could tell the difference from the 720 to the 4k, but truth be told, I’m just not scrutinizing the picture quality of my TV that much.