No, that's not how things work. You don't get to apply a defective algorithm to a problem, and then claim that you aren't responsible for the results since the algorithm that you created is defective. Google has a
very
high false-positive rate with this.
Any time they make a statement about another entity which is demonstrably untrue and causes harm to somebody's reputation or prevents them from generating revenue, that is grounds for a defamation lawsuit. The fact that they have automated their defamation does not remove their culpability.
It might also be a violation of anti-trust law since Google has its own software-delivery channels which are not subject to the same warnings.
>Even if their approach utterly sucked it wouldn't be libel or defamation any more than saying "Never trust a company which changes its name without the old name featuring sonething which becane obsolete." or "Any company with a rate of growth over 10% for ten consecutive quarters is probably a Ponzi Schene".
It's completely different because those statements are not made about specific entities, nor do they make specific accusations about any entities.