There's a difference between content moderation and censorship. Not to mention shaping user experience.
For example, If a site has a mechanism where after X number of downvotes by users, your comment is hidden, that's not censorship.
You've spoken your piece, and other users voted on if they liked your comment or not, or if it contributed to the conversation or provided useful information, etc.
Those other things you mentioned, you do so without context. No social media site can function and be a useful and valuable place to visit without some form of content moderation.
The distinction lies in where the line is drawn. Can you (constructively) criticize the site mods or parent company? Speak your own views in a reasonable discussion that don't cross the line (calls for violence, unintelligible ranting, trolling)?
There's a fine line for a lot of this.