Modern music is watered down and simple. The drums are all 4x4, the chords are all the same, the progressions are predictable, etc. I'm not talking about just a genre using a particular set of chords, I am talking about literally being able to predict the next note using only 10 seconds of audio. Moreover, there is so much tooling around making absolutely talentless hacks sound good (auto-tune, quantization, very clever filtering) it's hard to actually know if someone is even real sometimes.
More than ever I've also noticed modern music videos are simply advertisements for luxury brands. I just think the new generation lacks the sophistication to enjoy good music. Every generation since the invention of arguably the highest most supreme form of musical arrangement, orchestral arrangement, has resulted in slowly stripping away any sort of intellectual endeavor listening music had held. There's a reason classic rock is called classic rock and stuff made in the 90s onward doesn't qualify. It was probably the last period of time where music actually required talent rather than a ghost writer and an advertising deal. This isn't just my age speaking. I suspect in 50 years people will still remember Zeppelin, but no one will remember Jay-Z.