Try logging in as a new account with less than 15K of karma and speak passionately about topics which mean something substantial. It's a different HN world view.
I'm not sure what this has to do with the idea that a generic Ask HN about HN itself is going to be 'disappeared'. HN posts are almost never 'disappeared'.
But maybe you can find some links to examples of the bad things you're describing? There's people commenting on all sorts of topics all the time and the overwhelming majority of their comments appear to be doing fine.
There are "flagged" posts, which say [flagged] and then there are disappearing posts which just, disappear!
I have had such posts open in separate tabs, and when refreshed they and their content show up blank.