What are they playing on the FM radio stations?

Nashville has at least 30 different AM and FM radio stations. I took 30 minutes of my time to see if I could locate a station that I could listen to and enjoy its music. I searched and what did I find? Zero, zip, naught, nothing. Is it just me or are these radio stations all sending out junk music over the airwaves? I did not hear one song I could associate with. I am not a fan of country music, so that only left pop rock or crock or whatever they call it. I finally gave up and slipped in a 70s cd of love songs, sat back and relaxed. Is it just my older age or am I not alone in my FM dial search for good music that use to be there?