@pikesley I hear ya and I wish you luck. When I was there, I had real strong feedback for the docs team on how OAuth was doc'd. Something to the effect of "You gave me three different technical explanations in three different sections of the code maintained by three different teams... and no working examples."
I got the sense that the open-loop at Google is nobody was tasked with plucking a naive user off the street, sitting them down, and paying them to go through the docs and try to do something.
(... FWIW if there's anything I can help with LMK. My knowledge is rusty and ancient and may be out of date, but I still have some of the old patterns jangling around in my brain and I might be able to help clarify WTF Google was thinking in these APIs. Cloud used to be the team I was in).