Are you going to blame every stabbing that's occurred on knife manufacturers? It's silly to think that people have enough agency to voluntary part with their own money yet somehow lack any to know and decide on what they're purchasing. No one's stopping anyone from buying a Jolla/Sailfish phone if their heart desires.
> and they chose to misrepresent it, and they chose to forbid competitors to interact in their privileged space.
I agree with you that Tim Cook has misrepresented his claimed stance on treating all developers equally. I can't speak for the others. Even so, that doesn't make Apple a monopoly. And forbidding competitors on its own store is well within the company's rights.
> I still fail to see how engineering your own cryptographic monopoly and abusing it is different from abusing any other sort of monopoly.
Cryptography is intellectual property. Proprietary computational cryptography existed years before the transistor. Just ask the NSA.
It's not abuse to keep one's mouth shut on the specifications or refuse to integrate into an interoperable standard. That is one's right as a property holder.