Country that’s not “Bro Country” is definitely more popular than rock. Florida Georgia Line, and Old Town Road were incredibly popular recently. Rock music hasn’t been popular since the last big emo bands left.
I’ll take my flak and just come out and say MCR’s Welcome To The Black Parade is a genuinely good album, then Fall Out Boy turned pop, Panic At The Disco turned pop, Falling In Reverse turned rap, Escape The Fate became irrelevant, 30 Seconds To Mars stopped.
There was a few alternative rock and grunge holdovers like Smashing Pumpkins, and Foo Fighters but they’re getting softer and softer.
Rock is not that popular anymore.