I think that's different than complaining about censorship (often at the behest of politicians) on ubiquitous public forums. And the rules are not clear and you may not even get an explanation. And all major platforms and even infrastructure providers like AWS more or less act in unison. I think it's a valid complaint.
If what you have to say is so revolutionary, surely people will be coming to your new site in droves to hear your amazing commentary they can't get on Twitter.
Except nobody actually cares about what these people have to say, or else they'd have already done so. Half the time you can bet it's some middle aged dude pissed off that he got reported for calling someone a slur or spreading 5G-mind-control-level conspiracy theories.