But they aren't a normal publisher. They aren't the creators of the content. You are asking them to be responsible for millions of people who upload content daily. And no algorithm is going to fix removing all instances of "bad" suggestions. It would require staff from just about every language on earth curating/moderating every single video posted. Because that is the only way to remove videos before they "fall" in the algorithm.

Or remove the algorithm, and search videos by "newest first" or "most watched" etc.