I've gone through your post history and I can't find any posts that were deleted.
There was recently some moderation by a valve employee on one of our news posts that removed a bunch of comments that were related to political posts etc... but none of your posts were affected.
Do note that you need to adhere to steam community guidelines, that includes not insulting anyone or inciting any flame wars. While going through your posts looking for any that might have been deleted, I saw a lot of posts that break the steam community guidelines.
While you are welcome and encouraged to provide your opinion, you must do so in a way that is not disruptive and does not put down others. Calling people "children" is a good example of this. I've issued warnings for these.
Note you already have a warning for this previously.
If you have a link any missing topic, feel free to let me know at ...