Is it really? In this example, could you not see anything wrong with calling employees losers and monkeys, until someone linked you the CoC?
To add to it, the post is still calling people losers and monkeys, so the CoC is clearly not working properly.
Code of Conduct cannot stop someone from doing something.
It’s just a document.
However, in this case, the presence of the code of conduct has made it trivially easy to point out the language as wrong in a way whoever wrote this for Zig cannot refute.
It’s working exactly as it should.