To be fair, this: “As expected, we did experience revenue headwinds this quarter, including from Apple's changes that are not only negatively affecting our business, but millions of small businesses…”
… means something very different from this: “Apple’s privacy rules to blame for Facebook’s lower than expected quarterly growth, says Zuckerberg.”
The two statements are actually quite different. The first statement is likely true, and it means adverse conditions existed and this was one of them. The MacRumors version means that Zuckerberg made Apple out to be the sole or main reason for the lower growth, and he doesn’t appear to have said anything of the kind. Please don’t start adopting The National Enquirer as a model for journalism.