The man is currently the leader of the free World, he has all the free speech he could ever want. There is nobody stopping him from holding press conferences or even making televised addresses to the nation. The fact he generally chooses to ignore these means of communication is his own choice. Freedom of speech, this is the man who has purposely excluded a large proportion of the media from his briefings.
Yes, he has eventually been kicked off Twitter and Facebook but that it not the removal of the right to free speech. Those services are exactly that, they are services and if the owner of those services no longer wants you as a customer they are perfectly entitled to stop doing so. The fact that Trump prefers to express his opinion in bursts of 280 characters should be seen for what it is - a failing.