This system is useless because it does not communicate the reasoning behind a downvote, nor is it objective in the first place. People downvote for many reasons, and quality is the seems usually to be the most likely. You could make the most informative and objective correct video, and toxic communities could downvote it because they feel triggered for some absurd reasons, or because it competes with their favored content-creator, or because of reasons which are independent of the video itself

You must be pretty deep inside the bubble of the topic, as also the bubble of the content-creator, to be able to evaluate the value of the rating. And that makes it worthless, because most people can't be that deep and follow everything. And the people who are, are more likely re-enforcing their own ignorance.

The Ratio is one of those tools which are making sense when they are fresh, but become corrupted over time, making it useless after a while.