They'd have to violate the law. As it stands, they're not engaging in anti-competitive activity. Simply being better at something than your competition isn't anti-competitive.
> Seems like we're heading to a dystopian future where megacorps own you in every sense.
Literally every business that Amazon has entered has improved my life. Books are cheaper with an enormously larger selection available. Prime Video offers alternative to Netflix. AWS has revolutionized the software industry.
Don't get me wrong -- Amazon is in it for Amazon, and I think Jeff Bezo's can be an asshole. But the reason they get my money year after year is that they do such a great job.