Yeah, I think their "artsy fartsy" category needs to be split. If the reviewers are consistently positive while everyone else is negative, it tends to be in one of these categories:
* Overly artsy
* Overly political. Reviewers feel the need to give it a positive review because they agree with the message, while the audience will split because they're not as homogenous politically.
* Outraged fans. Reviewers aren't typically fans of a given franchise and so won't notice if it ruins something that would irritate a fan. The Last Jedi is in this category.
* Bribery.