GCP doesn't operate the same way as Google consumer products. We are a paid customer for over 5 years and I also have only good things to say about GCP and their support
Really because I'm a GCP customer also and earlier this week they arbitrarily shut off Looker on us with no explanation leading to tons of pissed off customers. Our account executive responded with no help and a link to file a ticket. I expect a lot more from a service we're paying $10k+ a month for and my experience with Google has been so bad we're considering migrating everything to Microsoft.
I'm curious about how is the support these days. My last interaction with it was along the lines of "Uh, why are you contacting us for advice and not like, use the docs". This was for a new project and asking the same set of questions to AWS led them to send three guys to our office the next week for a round of demos and best-practices discussions.