Users of the site only have one control available: the flag. There's no way to object only to the title but not to the post, and despite what you say that title

Users of the site only have one control available: the flag. There's no way to object only to the title but not to the post, and despite what you say that title hit the trifecta: not the original title, factually incorrect, and clickbait. So I'm not that surprised it got flagged (even if I did not flag it myself). Email the mods at hn@ycombinator.com. There's a chance they'll remove the flag and re-up the post.