Those problems are partly attributable to Zig itself. If the project accepted AI-assisted contributions, this controversy might never have happened. Completely shutting out one side of the industry and taking a dogmatic position is not helpful, especially for a pre-1.0 language that is still relatively immature.
Now the Zig community is attacking one of the largest and best-known codebases ever built with the language. Anthropic’s motives are clearly promotional, but even so, I would not choose Zig for any project.
I'm on the same page with you that their AI stance is probably harmful for them -- but I think they wrote those as a reaction to the contributions from Bun and others. So your implied timeline is not entirely correct.