Free speech does not guarantee you a soap box to stand on. If nobody anywhere is willing to give you a soap box that's your problem. Now there is an argument to be made that speech isn't truly free if you have nowhere to say it. However even with the laudable goal of ensuring all speech as a home somewhere, that still would not obligate any private person or organization to supporting it.

There is no public unowned property on the Internet.

If you downvote this comment it probably means you disagree with the sentiment but still choose to suppress this speech to express that disagreement.