It’s not that New Jack Swing was garbage music (at least the good stuff, Milli Vanilli was able eat in the late ‘80s).
The NJS era produced some classics, but the real problem though is trying to blend R&B and Hip Hop which ends up b*stardizing both genres. That shyt started with NJS and and carried into the ‘90s with Bad Boy, Montell Jordan, Adina Howard, etc..
By the early 2000s, you had rappers like Nelly and Ja Rule “singing” their own hooks and R&B singers like Jagged Edge doing that sing-rapping bullshyt.
This is what R&B was sounding like in the early 2000s:
This shyt ain’t R&B or Hip Hop. It’s some kind of homogenized mishmash. And this shyt pre-dates autotune.