As for why - perhaps the submitter felt that it was misleading for the title to pick on just MS and Apple when Google is also implicated in the article? That's a legit reason to edit a title on HN—it's one of the unlesses in "Please use the original title, unless it is misleading or linkbait".
Probably not random. Since there is always _at least_ one anti-Google article makes to front page every day. And the quality of discussion on Google related is probably the lowest on HN. The mod team didn't seem very eager to moederate Google related threads so far.
Everyone who has preferences for one $Bigco over another thinks that HN and HN mods are biased against their favorite $Bigco and biased in favor of whatever $Bigco they don't like. You could substitute any other $Bigco for Google in your comment and it would be exactly what other commenters claim. This is tedious, as I mentioned; it is merely a projection of the commenter's own preferences.
It's the same phenomenon by which zealous sports fans think the refs are totally biased. It's actually a cognitive bias rooted in the fact that the bad (what you dislike) stands out more than the good (what you agree with)—i.e. people heavily weight what they dislike, and underemphasize, or simply fail to notice, all the opposing data points.
https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...