Scores by themselves are useless in many cases. I once was heavily involved in a customer service survey. It was basically "From 1 to 10, how do you like the service." What we noticed what that Nordic countries gave a complete different number compared to Mediteranian countries.
First they thought it was because the service was much better in some countries compared to others. Looking into it and asking customers we found nothing.
We then started asking a second question: "What service did you expect." and then measure the difference. So if you expect a 6 and you get a 6 it is much better then expecting a 9 and getting a 7. So a 6 can be better then a 7.
The issue was that the first time we did not have a base to start from. In school-tests the base is pretty easy. 100% is perfect without any errors.
Compare it to Americans and Enlish where one would say "Wow, this is AMAZING. It is the best I have ever seen." and the other would say "It's not bad." (I jope you get what I mean.)
When I look at at scres for movies, restaurants, books or whatever, I read the comments to know WHAT they thought about it.