If you check those ratings you will see that they are bimodal: Either decent, or the lowest rating possible, because the reviewer loathes some specific choice. The most hated choice by far is that the cast is diverse, very contrasted to the original films and the books. Think about how no women talk to each other in the original film trilogy, and how there's a large overlap between evil humans and non-white humans in the books.
Unless you hate the recent push for diversity, you will probably like it. I loved the scenarios and music, and really liked Galadriel's acting. I was only taken aback by the apparent slow pacing (but other people might perceive it differently). 8/10, would recommend. For reference, I'd rate LOTR 9/10 and the Hobbit film trilogy 5/10.