Author here - Given that I‘m not in the US puts me at a disadvantage. But if you can forward me a good lawyer who is willing to work with me on this, I may give it a shot.
Did some googling (lol), was looking for any lawyers who have won successful defamation cases against Google. The top results that were successful suits in non-US jurisdictions (Australia, Japan, Ireland, Hong Kong).
Ex. https://www.mondaq.com/australia/libel-defamation/931462/goo...
I am not a lawyer, I just find law very interesting. I'd recommend reaching out to a few lawyers that deal with defamation claims in your current jurisdiction to see if they think you have a claim.