You see this argument all the time, but in my opinion music hasn't got worse, its got better, just that there's more of it, and as a consequence more diluted.
Its a decade later, rock music was better in the 60's and 70's, but as an obvious rule, things move on!
If you didn't miss an era, enjoy what you experienced! If you missed the boat then by all means listen back and enjoy that, but don't whatever you do get stuck in the past!
There's so much going on today that is so much better than 10 years ago, you just have to look hard enough and accept that its 2009. I'm more interested in what 2019 will bring than 1999 ever did!