How can this only have a 4.8?

indeed.

Would you settle for an 8.4? Oh well, I gave it 6/10.

I think most of the lower ratings are made by adults rating a children's movie. I absolutely loved this as a kid, I didn't know or care a stuff about editing or cinematography and the like. Not many kids do, they just want something fun and exciting to watch. Let the kids rate it and see what happens.