What you wrote wasn't critique, it was an accusation out of anger about the game using mechanics and stuff from Source, which is notable for being free to use.
You have not been censored, nobody has deleted your comments.
Offering constructive criticism is always encourage but what you wrote wasn't constructive. It was bashing, and people are right to call that out.
If your comment was deleted it would have been censure, or if you were forced to alter it. But no one has forced you to do shit. You just need to realize that this is a public forum and your critique can be critiqued and just yelling "unfair" won't make it happen any less.