It probably goes without saying that this would be an extremely unpleasant place, but there would be nowhere else to go once the last platform won.
What we have today is a number of smaller social networks, each with a different strategy to shape the conversation. It may very well be true that the creators of a platform choose editorial methods and goals that resonate with them personally, but what’s important to the dynamic of the platforms and free speech is that until we are all on that one terrible platform, that methods used to moderate your speech are nothing more than a company’s efforts to differentiate their product from others.
Restricting speech is in the interest of product differentiation. This, of course, is in the interest of the owner of the product, but it is always also in the interest of the consumer who wants a rich speech market to choose from, and who loathes the idea of a global 4chan style megasite to the exclusion of all other social media. This is why failure to limit speech in the context of a coherent speech product is always counterproductive.