Times change, and tastes change with it. In the 1950's and 60's parents hated rock music, they thought it was corrupting their kids and it was "loud noise". So, just because the style of music has changed and it's not something you like anymore, it doesn't mean it's "bad", it's just that you have your taste that you grew up listening to and you don't want it to change. People who grow up in the 2010-2020 are not going to like rock music, they're going to be fond of Katy Perry and Justin Bieber. It's always been like that, and it's not going to change.