I mean, deleting content is, by definition, censorship. Not all censorship is bad. For example, I think everyone here wants spam to be censored. Let's not change the definitions of words :)
Censorship of CCP criticism would be in the modlog if it were true. I've only been here a couple weeks but the only things I see the admins refuse to tolerate are racism, homophobia, and hate speech in general. They don't allow porn but that has more to do with practical challenges than any (expressed) problem with other people wanting it.
Almost every instance will almost certainly filter illegal content in their respective jurisdictions, and those that don't might not be around for long.
There is a modlog. Just click on it, and you will see what gets removed.