Back in the day we had FM, the 'underground' formats some had would play pretty wide variety, remember free form! This is how we discovered more interesting deep cuts, even more commercial stations played far more than top 40. Also had University stations in my area, classical, jazz and more heard here.
Forget FM today, with exception of University stations you won't hear anything new and interesting. One has to stream these days, and be open minded about genres, plenty wonderful music out there. If all one likes is rock, then yes, today's rock not nearly up to standards of the 'olden' days. I agree the 'commercial' music of today is pretty bad, between commercials on tv and music you hear blasting from cars and other's stereos pretty bad state of affairs. Plenty of criminally unheard and underpaid artists out there, just have to work to find them!