What really underlines this blog and thread is that as of the moment of writing this comment, there's no official answer from Google, or even a non official one from an employee. The feeling I get as a customer is that they just don't care.
from below: I work here in Google Cloud Platform Support. First, we sincerely apologize for the inconvenience caused by this issue. Protecting our customers and systems is top priority. This incident is a good example where we didn’t do a good job. We know we must do better. And to answer OP’s final message: GCP Team is listening.
Our team has been in touch with OP over what happened and will continue digging into the issue. We will be doing a full review in the coming days and make improvements not only to detection but to communications for when these incidents do occur.