i can't really refute you because its true top 40 hits are pretty much all trash nowadays, but that's how it works nowadays, there's still tons of good tunes coming out, and there's the internet to find it, so i'm content.
also, the 60s weren't so spectacular for pop music as you might think. in 1969, the number 1 song was "sugar sugar." by the archies. as in archie comics archie.