Why is modern pop music today so terrible?

I've somehow arrived at an age where-in I find myself at times lecturing the younger folk around me about how great music/radio was back during my time. It's difficult to check myself but I do.  I sound boring.  

Attended a wedding for a couple of millenials a few weeks back, spent most of the time sitting with a table of strangers, watching the "kids" dance and sing, scream while smiling into one another's faces their songs, their music. Wow. I remember doing likewise a few decades ago. 

I'm 60 now, way past the time when AM radio offered a surprising diversity. Hell, I don't know if there are even music radio stations on AM radio right now.   To paraphrase Public Enemy, "Elvis never meant sh*t to me", but I have friends for whom Elvis meant everything in terms of their personal rebellions against their parents' music. For me it was the Beatles, then Zeppelin, then...

Current pop for me is virtually unlistenable, but I have to respect the "kids" and their airtime/era. I don't belong there, I won't get it because I'm all growed up. 

Worsening matters matters are the "classic rock" stations pandering to my generation. I'd rather try to listen to current pop than wallow in the past. 

It doesnt necessarily "s*ck, it just ain't for me no more. 

Yes indeed Elvis did innovate the Rockabilly style. 

Passage of time doesn’t alter whether a musical piece is good or not .
What was an open mind at 20 would be an empty one at 80 .

I wallow in the past all day , every day , Bach is still perfection 400 years later ,

inna, there is a lot I don't understand , that's for sure .
One thing I do however is if I used your logic as a base 
 2+ 2 would equal 7 .

I thank God I knew a great songwriter who introduced me to J.S. Bach when I was twenty-four. For the "richest", deepest music, I turn to him, with increasing frequency and consistently as I have gotten older. One has to listen to him last in the day, as he is a hard act to follow!