I tend to ignore the top 20 and don't listen to much music radio anyway. There is still lots of good music out there, but people may not get to hear it as the radio stations play the same old stuff.
It was encouraging that Steven Wilson, who is pretty much unknown to the general listeners, can have a number 3 album in the UK. I did hear one of his songs on the radio, but some may feel he compromised by being a bit more 'pop' than usual. He has said that he grew up with bands like Abba and wanted to do something in that vein. I hope a lot more people know about him now.
i don't listen to modern radio stations either. makes me sad
There are some stations worth listening to. BBC 6 Music in the UK plays a good variety of music that you won't hear elsewhere. They don't have the commercial pressures of other stations. BBC 1 and 2 are pretty mainstream during the day, but have some speciality shows in the evening. I get my prog fix from various shows on this site. I've found a lot of bands that way