These situations are almost always self-inflicted. If someone else hacked Google Cloud this badly then you’d likely have heard it from them first. And they probably would have done something significantly more destructive if their goal was harming Google reputation.
“Unprecedented” Google Cloud event wipes out customer account and its backups (arstechnica.com)
Google Cloud accidentally deleted UniSuper’s account and backups, causing a major data loss and downtime for the company....
Ford asks suppliers for ideas to cut EV costs in an all-win-or-lose push for profitability (electrek.co)