Extortion Scams and Review Bombing Turned Goodreads into Authors Worst Nightmare
time.com
time.com
I now tend to get my reviews from e.g. Wirecutter (for products), critics that I seem to be aligned with in taste (for books and media), or generally whatever source I consider trustworthy and relevant for a given subject. The important part is that there usually is an identity of sorts attached, with editorial guidelines or maybe just a certain consistent personality. And if I see that that source increasingly diverges from what I'm looking for, I can drop it from what I consider relevant.
For authors, and maybe generally, the problem is that crowd sourced reviews have largely gotten the norm, and their success is at least partly dependent on pleasing (or placating) that crowd.