People who are unhappy with the community or the direction of nix should leave and start their own thing. They'll discover that building something is actually a great deal harder than it looks from the outside.
It sure is remarkable how many people seem to be assuming that the people complaining must just be some outsiders with no involvement in the project. It's maybe worth asking yourself where that assumption comes from.
You're not going to understand complex governance issues and their history from a read of a single article or letter. Consequently, you probably should refrain from drawing conclusions that way.