i'm the youngest to post so far at 22, and i have to say it's more statistics than quality, as in, listening to 65-80s stuff, you're only going to hear what everyone has decided is best, the tried and true kind of stuff. you're filtering out the crap that was on the radio for a week before everyone realized it sucked.
the radio these days does suck, but i don't listen to it (apart from at work)
you can find good stuff, you just have to hunt it down (just like everyone else has said.) you'll be the filter for the next generation, that'll make them think that music was better from 95-2010s. (or worse....)
i'm all over the place, taste-wise, new and old, bluegrass, metal, swing, big band, hip-hop, calssic rock.