> people have pointed put “russian bots” on HNany times without being flagged or deleted
Because dang didn't see those comments and they weren't flagged by other users. If you see what you think is astroturfing, or dishonest/manipulative/HN-guideline-breaking comments (like those above), downvote and flag it, and if you want to respond, don't accuse the user of astroturfing, but actually respond to their points. If the people on the other end are really FSB officers or whatever, you literally waste their time and money, and divert their resources from other things they could be doing (e.g. the war in Ukraine). Accusing someone of astroturfing isn't just against the guidelines, it's counterproductive!
Use that flag button!