I've used GCP support on accounts with huge support contracts and enterprise agreements and it's still a bit of a wash if you get good support on your first, second or even third run around the reply button.

At least it isn't (paid) Azure Support - that one is noticeably outsourced to people that sometimes lack basic comprehension for the problem. I once asked about their VPN Gateway and got a random API Gateway response, then nothing for a week, and then a new rep.