There are still a lot of caveats. For example, your server hosting provider can block you for posting objectionable content, like anti-LGBT references. If you host at home, you ISP can ban you. Then comes the domain extension. The domain extentions are controlled by some company or the other, like .com is managed by verizon, .zip is managed by Google etc. They, or the domain provider can also terminate your contract.
Onion domains may be a solution, but if you post seriously objectionable content, like leaking CIA secrets, you can expect someone to knock on your door soon.
Walk outside onto the street corner and start shouting all the speech that you're supposedly being censored for here. Free speech doesn't guarantee you the right to say what you want on other people's platforms.