You can't say that 'music nowadays' is bad unless it's opinionated. You can't say mainstream music is bad unless it's opinionated. You can't say any music is bad unless it's opinionated.
Hey, I like a couple Justin Bieber songs. I like some Lady Gaga songs. I like some Lil Wayne songs. Are they my favorites? No, of course not. They're catchy songs, so I enjoy listening to them occasionally.
But get this! I also like Queen, Led Zeppelin, Pink Floyd, Johnny Cash, Elton John, David Bowie, and a whole bunch of other oldies! Oh man, isn't that just so surprising?
But oh stuff, I also love Three Days Grace, System of a Down, Green Day, Dir En Grey, Rammstein, Explosions in the Sky, Serj Tankian, HIM, Korn, Marilyn Manson and Tenacious D!
Who would've thought you could actually like songs from both Justin Bieber and Rammstein?