Maybe here? https://reportcontent.google.com/forms/rtbf
degoogle
Quit your Google addiction. Use privacy focused Services.
hmm.. painful. That page assumes I speak the language of whatever country my Tor circuit exited. I see at the bottom there is a Google reCAPTCHA barrier.
Nonetheless, I’m glad to know my options but I guess I’ll have to keep trying that page until it speaks my language before I can work out whether it’s a lesser of evils.
In the end, my question is more legal than technical. I could find out Google’s postal address and send them an anonymous letter. But the problem is perhaps that legally Google only needs to honor the GDPR requests of those whom it can identify. In fact, I think it’s expressly written somewhere that anonymous people do not have GDPR protection.
My question may have no answer. Perhaps I have to let Google have my identity as a trade-off to getting GDPR rights.
I'd like to see this go to court, actually. I don't think you have a case, because Google is just acting as a service provider and those have been found to not be liable for actions of their users. Like Google is not at fault if some users conspire for a crime over their services. But as I am not a lawyer, I'd really want to see what a court has to say.