When Beato laid out his criticisms of some popular music of the current era, it was really twofold. One, his specific points (few if any chord changes, overwhelming use of auto-tune, machine-like quantization of music elements such as rhythm, etc.) are totally factual. Two, his opinion of these stated points - he doesn't like them and feels these things have degraded the quality of music. The points themselves are absolutely true and cannot be disputed, even though this doesn't apply (although perhaps sometimes in varying degrees), to some of the other popular music. Obviously though, there are many people who simply don't care about the points he made. They just like it and that's it - end of story. I have a feeling that, even if you cornered these people and carefully demonstrated the truth of Beato's points, the big majority of them would simply shrug their shoulders and say "So What!" or something to that effect.
So in the end, it's subjective according to each individual's personal taste, but that doesn't mean that there isn't substantive, objective differences between the aforementioned popular music and popular music of past times. Although quantization entered the picture some in the 1980s, the other points he made didn't apply, although there were certainly notable exceptions of simple structure like "Louie Louie" for instance. Overall though, most songs had more complex structures than that. Great efforts were made to create involving verses, choruses and breaks, as the song sections were widely known. Practically every song had an intro and an ending (or outro) too, something which is so often lacking in the previously mentioned current music. There always seemed to be a real attempt to draw in the listener with "hooks" (something that I don't disparage at all) and then create a mood, whatever that may be. These things were often referred to as songcraft, which was widely admired in past times.
Now, I can almost predict some responses ... "c'mon, artists like that still exist today!" I know that already. Of course they do. The big issue is that the big majority of them are submerged in that huge body of music outside the popular "Top 40" area which is partially occupied by those previously mentioned "artists". Despite that, the access to such a great amount of music today which I may never have heard otherwise, is a wonderful thing, and more than compensates for any of these negatives.