As someone who is currently struggling with Google Cloud's mediocre support, this is not surprising. We pay lots of money for support and have multiple points of contact but all tickets are routed through front-line support who have no context and completely isolate you from what's going on. For highly technical users the worst support is to get fed through the standard playbook ("have you tried turning it off and on again?") when you're dealing with an outage. Especially since the best case is your support person playing go-between with the many, siloed teams trying to troubleshoot an issue while they apparently try to pass the buck.
Not to mention the lack of visibility in changes - it seems like everything is constantly running at multiple versions that can change suddenly with no notice, and if that breaks your use case they don't really seem to know or care. It feels like there's miles of difference between the SRE book and how their cloud teams operate in practice.