Literally just built a custom Adsense dashboard based on not integrating with Google's APIs. Every couple days I export the 2 reports I need from their UI and save them to a folder; it's automated from there and integrates with my clients' website - thats good enough - even if its not real time its a small price to pay for not having to navigate (and maintain) Google's API madness. Like you said 8 different dashboards before you get what you need (and frontier LLMs cant help here), and even then you are forced to build some elaborate Oauth app instead of just getting a simple API key that you can paste in a .env file