I'm not sure how that guy writes a review that long and that vicious about that episode. It was a bit trite at times, but some of that is because Tolkien formed the based for most of what we expect from fantasy and well that is the base material. I also think the criticism of most of the acting is off base. In fact, I think the actress that plays Galadriel is pretty good. I'm not sure any of the acting is amazing, but I don't think any of it is bad.
In fact, the one scene he likes I think is the worst written and most confusing scene in the last episode. It just falls flat and there is no reason for it to go the way it did.