It sounds like you are living in an alternate reality, your concerns describe the Twitter Musk is ending and why he is ending it, projection much.Challenged no, cancelled yes.
This is potentially the greatest boost to public discourse and democracy since the internet. The establishment thought police have just got a bloody nose, the market has just been pried open. The corrupt establishment are in a lot of pain, they thought their domination was complete and unassailable.
I say potentially for hopefully obvious reasons.