It seems like you view free speech as "everyone should be provided a platform to speak their mind", more or less. With that view, what you speak of is arguably a problem, sure.

My view of free speech is simply: the government shouldn't arrest you for publishing most things (with only certain mostly-well-defined exceptions). If there are views which are not illegal but which no platform will let you publish, I really don't see the problem. If enough people share those views they can get together and make their own platform. It's not even hard to make a platform anymore, anyone can buy a domain and set up nginx on a raspberry pi.

Freedom from government persecution on the basis of speech is extremely important to me (again, with exceptions). Freedom to publish unsavoury-but-legal content on other people's platforms is completely unimportant to me.