I had a product idea I have yet to make where you replace ratings with rankings. Instead of giving something a 1-5 review, you just answer a few quick questions whether something is better or worse than a listed alternative. You aggregate enough rankings and you can give everything a percentile score. The number is actually meaningful - a 70% means people on average think that it's 70% better than all ranked alternatives.
And you can't lie or influence a ranking as easily. "You think Rings of Power is a good show? Okay, but are you are actually going to rank it above The Sopranos?"
Are you aware of metacritic? They take all kinds of ratings, scales, stars, grades, etc, from all kinds of critics and reviewers and turn them into nice 1-100 percent ratings to average.
A 7/10 from Gamespot is useless data because they give 7/10 to everything.