The points the OP article make add up to the biggest steaming pile of dog shit I've ever seen, and I've owned some big dogs.
Let's start with the first sentence and the comparison to the railroad. You pay to ride the rails so right there's no comparison. How many of you have paid one damn dime to facefuck or twatter? None of you, that's how many. The railroad doesn't deny service due to speech because it's not central to their business.
The focus on facefuck and twatter is just stupid, they're apps. The are big apps but they're still just apps and free at that. Their presence on the Internet does not preclude anyone else from launching a competing app so they are not monopolies.
What Amazon Web Services did to Parler is a huge problem though. Money changed hands there and AWS is not an app, they're infrastructure. Not only that, the argument their lead attorney made in court regarding the Parler dust up was fascist to the core.
Amazon is the problem.
I feel your emotion.