I never claimed Amazon has a monopoly. I just hear what the GP posted a lot, but when reading the actual law it seems to be incorrect. So I'm trying to figure

I never claimed Amazon has a monopoly. I just hear what the GP posted a lot, but when reading the actual law it seems to be incorrect. So I'm trying to figure out why what the GP stated seems to have become the case: because lawmakers passed something else? Or courts didn't like it? Or what?