neither of "there is one rust build system" or "the republic of Rustacea does not have a fair judicial system" are criticisms of the Rust language

True, but "There is only one ecosystem that the Rust language is designed for." is. You're right about the second one, though, but since that community is the official community, it's still definitely a big fuckin' problem, and one that does affect the language, even if it's not directly about it.