Again, this isn't a free speech issue. Free speech allows you to speak. It doesn't allow you to stipulate WHERE you speak.
I don't entirely disagree with you. I think that the size and influence of these platforms is far beyond what could have been imagined when these laws were being written. I think it's clearly important that serious thought is given to how to update tthem for the social media age. But if you insist on framing this as a violationo f your rights, you lose all credibility.
Instagram bans women for showing their nipples for God's sake. Inciting a riot at the Capitol building must be fair game if that is.