I think most courts would conclude that freedom of speech is the right for you to speak in a public place or to publish using your own means. It is not necessarily the right to be heard by the particular audience you desire to reach, nor the right to publish using someone else's equipment. The internet is still an open place, and there are plenty of venues other than Facebook, Twitter, and YouTube where you can express your thoughts and opinions. You can also build your own website or blog and seek attention to it by reaching out to others for links.