I'm far more worried about the Snoopers charter than social media curbing free speech.
Whilst I value free speech as an inalienable right, access to social media isn't, nor is the freedom to say whatever you want on their services. You agree to their terms and conditions when signing up, after all.
Yes and no how many of us just click I have read terms and conditions and have done so

I recall Gamestation iirc having people sign their terms and conditions and a near first point was "Gamestation will possess your immortal soul" or something like that.