There seems to be an increasing problem with automated content filtering systems that filter out legitimate actors. This seems like a very broad problem that is hard to generalize, but perhaps I'm wrong. It also seems like the problem will only get worse as the Internet grows even larger. I wonder what the end result will look like, if this will just magnify the effect of walled gardens.
Google is trying to be non-partisan, so that they can have their algorithms continue to do all of the work.
They delegate “what is true” to trusted sources rather than taking a position themselves, which is then frequently abused by wiki editors and crowd swarm attacks.
Recognizing correctness over both reputation and quality is not something an algorithm can evaluate with finality, and is an aspect of the old Yahoo! Directory that Google has never been able to replace.
Google will continue to worsen at any search for which one possible reply is snake oil, because they continue to refuse to apply human reasoning and make biased judgements for and/or against the claims of the sites they index.
This will eventually be the end of Google, but they seem unwilling to confront it.