> Is "clown GCP Host" a technical term I am unaware of, or is the author just voicing their discontent?

The term has been in use for quite some time; It is voicing sarcastic discontent with the hyperscaler platforms _and_ their users (the idea being that the platform is "someone else's computer" or - more up to date - "a landlord for your data"). I'm not sure if she coined it, but if she did then good on her!

Not everyone believes using "the cloud" is a good idea, and for those of us who have run their own infrastructure "on-premises" or co-located, the clown is considered suitably patronising. Just saying ;)