Culture vultures like Bruno Mars, Justin Timberlake, Eminem, Adele, Halsey, Charlie Puth, Taylor Swift, Olivia Rodrigo and many more other charlatans have led to the drop in quality.
They hit some struggle falsettos and people suddenly they are Marvin Gaye or Whitney...
Music education in the school or Church has been decimated and that is what many of the greats were born and raised into. Image was built after the talent was apparent.
Now, not so much, image is 90% and 10% talent can be augmented by tech...
Also, many producers of today are trash and can't read or understand music concepts, hence why they have to chop up 90s/00s samples in full since they can't create a simple bassline...