Those are great points you make and we'll take it to heart to assuage your concerns. If I may ask, what in particular was weird about the API? We're built to the Relay spec, which has become the open standard for GraphQL APIs.
To your point about the extra endpoint, I know they have different ones for simple, Relay, files, and from what you're saying not Apollo Client. To me personally, it seems a bit counterintuitive that they offer so many different endpoints when one of the premises of GraphQL was to have a single endpoint that was decoupled from the client. Open to your thoughts here to see how we can improve your experience as a developer from the client perspective!