80% is pretty generous, if you actually read the review. They were fair.
Metacritic is about collecting review scores and putting them together to find an average for consumers. Figuring out what a review is trying to say about a game in a simplified number-format is what their site is entirely about.
With that said, they HAVE to assign a number to reviews if that review is on an accredited site that is to be included in their aggregate. And they've been doing this for sites like Variety for a long time.
Deal with it.
SW-5120-1900-6153