> It was obvious to me from the beginning that GraphQL would add overhead and complexity on the backend;

Did you read the article? Most of the issues weren't related to GraphQL, they were just Node issues/optimizations.

> I think it's regrettable that all the big money got behind GraphQL instead of aiming for solutions which provide resource granularity and shift decision-making to the client side.

This is the stated intent of GraphQL. Literally the reason it exists.