Okay, so I've heard Apple "prioritized their own ads". If there's meat behind that - cool (and perhaps might not do anything about certain scummy listings on the app store)
But app stores and iOS ostensibly exist exactly so Zuckerberg can't do what he does, which is steal credentials. Facebook syncs everything, bought Whatsapp to do the same; of course he's pissed off his ill-gotten moat got attacked