It feels like there's two possible explanations here. One is that somehow the website has been incorrectly flagged or blacklisted, like the example he mentions with Bing. In that case, it seems like it'd be at least nice for Google to be able to look into it, but it also might be the sort of thing where Google just decides it's not worth the effort. The other possibility is that Google just updated their search algor…
That's a real issue - there is no rigorous and systematic monitoring of Google's results. There could be horrible biases and we don't measure, don't hold them accountable. There has been a recent spat at the Google AI Ethics department where a researcher accused Google of being biased because it uses language models trained on biased internet text (thinks doctors are men and nurses are women). I'd say - before going so deep, first check the actual page results for bias, it's 1000x easier to do that and gives much more useful results.