The thing about YT is, it shouldn't matter that "most of their stuff is garbage." No individual person can hope to consume more than a tiny percentage of the total. All that really matters is that there's enough stuff in that mess to satisfy any given person, and that there's an easy, quick, accurate way to find it.
I can't tell whether YT has done the former, because they haven't done the latter. There may be all sorts of great stuff for me in that mess, but if I can't find it, it may as well not exist.