I know it doesn't solve all the aspects of how broken this documentation is: but here's a pull request that somewhat tries to address it.

The Pull Request:

https://github.com/amzn/selling-partner-api-docs/pull/209

The Deployed Docs:

https://docs.contour.so/amzn/selling-partner-api-docs

Lots of bugs still to fix but hopefully it's helpful to anyone. Super open to any feedback!

---- Edit: To make it clear, the docs are built on a web app I built while on break from school. Sorry if that wasn't clear before!