Railing against popular music and scapegoating it as the downfall of classical music is probably one of the main reasons for classical music not being as popular these days. I think if you really feel that popular music is to blame then you should find creative ways to inject classical music into it. For instance, I like to take samples from classical pieces and turn them into hip hop tunes. Maybe if people who wouldn't normally listen to classical music heard it in a framework that they're comfortable with they'd be more likely to look into it at some point. Both forms have plenty of room for existence in our world and also have their own specific merits.
This kind of reminded me of a Coolio track where he used Pachelbel's Canon to build his beat around. The song was exceptionally popular and I doubt you'll find many people who aren't familiar with that classical piece or who don't enjoy it. Hell, that guitarist who did a rock version of the song enjoys the title of most watched YouTube video ever.
EDIT: Ah, I just thought of an amazing pop tune that I think you'd be hard pressed to write off as too simple or lacking depth.
Any Elliott Smith fans here? I have an obsession with
I Didn't Understand.