It's understandable that many "Ring" fans dislike this movie, but that's mostly because the movie is very difficult to understand. If you want to understand this movie better, you should read this text:
belindacarlislefan.deviantart.com/art/Sadako-3D-The-mystery-is-solved-345701471
(copy the link to your address bar, I had to do it this way because the forum doesn't allow me to post links, since I don't have 8 posts yet)
The text explains the movie very well, and it can change your opinion about it the movie is not so bad after all