My internal rating is:
Overwhelmingly positive: game is actually quite good and also probably, but not always, a niche game.
Very positive: most people don’t hate it
Mostly positive: Game has one or two big, specific issues for most people, like a specific performance or gameplay problem, but is otherwise fun.
Mixed: game either sucks or has had some controversy. Usually games that are good but not worth the money go here.
Mostly negative: game sucks
Overwhelmingly negative: exclusively reserved for shovelware and yearly sports games like FIFA and NBA games.