Original review:
https://www.themoviedb.org/review/69619b6fe75773b848d148cd
It's not for general entertainment and the audience is movie industry/enthusiasts. Movie critics and the people find effort to leave a review for it happen to be in the niche, therefore it has a high score. Sure, it this movie might have made some breakthrough in the industry. But I, like other general audience, didn't find it greatly entertaining.