Don't get hung up on "monopoly". Their games are only available on their own vertically integrated platforms. They're abusing their dominant market position and should be slapped hard ( full break up and multi billion fines).
Their games are available on PC, sold on Steam, and can run on Linux via Steam Proton. Just because they aren't available on one console doesn't make it that bad.
They can't run on PlayStation, they can't run on macOS, on Linux is thanks to a compatibility layer they have no relation to ( it's not their desire for the games to run there). Furthermore the games aren't available in any of the cloud gaming platforms bar their own ( Xcloud gaming? Xbox Cloud gaming? Who knows, Microsoft probably don't). They're artificially limiting competitors to the detriment of consumers.
“Artificially limiting” by choosing not to port games to those platforms? Would you say the same of studios who don’t port games to PC? Do you believe 98% of the industry is “artificially limiting competitors to the detriment of consumers” by not porting to macOS or Linux?
> it's not their desire for the games to run there
And yet they can prevent their games from running on Proton like some devs have done by anti-cheat measures. IIRC Overwatch refuses to run on Linux and risks a ban because of the Vulkan translation layer.
I agree in theory, but having exclusives is a requirement to compete with Sony and Nintendo, two companies that are somewhat outside the reach of US regulators. How to handle competition against foreign pseudo-monopolies isn’t an easy question.