No it doesn't.
I'm an absolute Apple fanboy with multiple Apple devices, but no, iMessage doesn't crush anything. It might have that appealing minimal Apple UI and look, it might work reliably, but it doesn't do anything better (apart from maybe privacy) than WhatsApp or Signal.
And please, US people, stop believing that iMessage is the world leader in messaging. It's not. In Europe it's irrelevant.
I would be more than happy to turn it into my main messaging app, but more than half of my family, friends and colleagues own Android devices, so we all communicate through WhatsApp. Even with the ones with iPhones.
And please, stop with that "social network" non-sense. Nobody needs "social" features in an app who's number one function is send and receive messages. These apps should limit themselves to send and receive content in a 1-on-1 or grouped way. Period. That's what I want iMessage or WhatsApp for. Not for "social networking".