Yes...It's just like Netflix viewer reviews...;) Often we find the movie very good--in contrast to most reviewers who said it stunk--or we find that it stunk, despite most reviewers who said it was great.
Reviews are merely opinions--not science or fact. Of course.
Witcher 3 got GOTY in '15 and it was riddled with flaws too--most of which CDPr fixed in a timely fashion. This game deserves GOTY because it is so good, despite the flaws some encounter--I've encountered almost none in my current play through with the last patch.
Bottom line--like with movies or books, game reviews are opinion and nothing more, or less than that. My opinion is that if you are an RPG fan for whom a 10-hour game is not in the least attractive, then you will love D:OS2's massive amount of content and variation. It really satisfies. But if you are a click-click person who loved Diablo II/III, you are not going to like it, probably, exactly because this game has so much depth. GOTY, for sure.