Not sure why the Internet is crushing this show with a 4.7 IMDb rating.
For the same reasons as Rotten Tomatoes or any other review site where initial ratings are questionable*. Half the time those not fond of the show and voting it down aren't going to agree on the number of underlying reasons either, though in some cases there may be some overlap. Dunno; there's no breakdown. But to adumbrate a few, some may hate actors for how many possible reasons and some reasons may be more surprising than others, or the fact it's another reimagining/reboot/regurgitation**, or that it's not being done well... Most rational people gave up on IMDB for everything except the cast and crew when they ditched the comment forums, and a number of those folks remained solely to artificially vote down or up a show for a thrill, until their next dose comes along.
* e.g. The Orville. It's not a 90% (never mind not 100%) show for me, but had enough innovations and fresh air ideas that render its first season far higher than what RT decided it was (theirs being 31%, based on-- this is becoming cyclical as well as borderline cynical, so I'll just say that given the legitimately subjective nature of entertainment in general to begin with, reading all their reviews was intriguing and I'm only halfway into theirs and some of them are interesting despite or in spite of their scores as well... My rating would be 74% for season 1 overall... YMMV. )
** it's why some people flocked to "Firefly" than to see a reboot using the name of some old tv show or movie it's partially influenced by
Pile on is making these rating sites completely useless.
They're useful for reading others' opinions, and some of them may or may not be peers... and even then your best friend might introduce you to a show you ultimately loathe or love. There's no one definitive reason, but these sites aren't completely useless either. They at least for advertising a show with.