If it wasn't for YY's amazing OST's that remained after the first two seasons, this would've barely deserved a 4/10. For someone who has read the manga, it is agonizing to see Ishida's great work come to be adapted as a low-fps badly drawn and thought through summary of itself.
While Tokyo Ghoul (season 1) and Tokyo Ghoul root A seemed at least comparatively decent despite all the flaws, the :re adaptation by Pierrots appeared at first as more of an advertisement for the source material, as with NGNL and DW, where well-made and abruptly stopped animated stories made the viewer wish to get to know the franchises as the author of the manga/ranobe depicted them.
But.
With :re, unless having read the manga beforehand, the one watching is most likely to consider the show and the entire franchise just... bad. Making it the opposite of an advertisement, really.
I only added on a few points to my rating as to pay respect to Yutaka Yamada, Ishida, and what the hype animated series "Tokyo Ghoul" once was.
READ THE MANGA.