I mean, you do know that the only thing copyright really does is allow the creator to control the distribution of their work?

What they do is create an IP for their shows, they deny the competition to compete where it counts; the quality of the service.

They don't "create an IP", the shows are copyrighted. They are copyrighted from the moment they are created (at least, in the US. No paperwork required.) They're not denying "the competition" anything except not giving away their shows for free.

If a platform creates exclusive content to lure in consumers to their platform, well, that's perfectly legal and has been going on a long time. After all, The Legend of Zelda has been an Nintendo exclusive for what, 30 years now? The lack of Zelda games on other consoles doesn't stifle innovation for game consoles.