My firm belief is that what is missing are the librarians. Google used to rely on web archives and inter linkages between sites, but bad actors from blogspam to quora have gamed this system in every possible aspect. There are probably just too few reliable sites compared to the global mass proliferation of unreliable sites.

Google will need to start taking tough, manual decisions on which sites to depritoritise in both what is shown and in what is considered in its algorithms in order to fix its search. And this is not a task you can outsource to whoever is the currently poorest native speaker is.