GCP doesn't really have the Google problem of lacking support contacts. I've managed relationships with GCP for a couple of different companies now (from startup to mid-size enterprise), and in all cases I had multiple dedicated account reps that I could not only get on a phone, but frequently met with in person.

Maybe the story is different for very very small fish, but I had decent experiences with support even at the ~20-person company spending ~5k/month level.