I have uploaded the introductory pages of the book where these bad reviews are found here:
https://fiveohomepage.com/misc/crime-tv-intro.pdf
These pages mention the various TV critics and writers who contributed to the "poll" that the book's ratings are based on, which are not actually spelled out anywhere.
It seems to me in the case of H50, FBI and SWAT, the authors of the book threw their own weight around as far as opinions of these shows was concerned.
Most WWW pages which list "the greatest TV shows of all time" may not include H50 in the top 10, 20, or whatever, but the show would typically be at least at the level of "a guilty pleasure."