You make it seem like todays internet monopolies exist because of all the platform there are, they are the most well-designed ones, and they would simply be replaced if a better product came along.

I disagree with that, youtube for example is not the prevalent video platform today because it is better than its competitors. Youtube today is absolutely terrible.

But it does not get replaced, because it is the established platform, and using a competitor is suicide because your content will never get any traction.

So we are stuck with a horribly monopolized web, where the established websites can become very shitty, but you have to stay on them because everyone else is.