You're overdoing these links. That's no doubt why you're getting downvoted and flagged.
It's fine on HN to post your own work (1) in places where it's relevant, as long as (2) you only do it occasionally and (3) are also participating in the community in the intended ways, submitting interesting articles and having curious conversation. But when users break these rules of thumb (and you've been breaking all three of them!) it crosses into spamming. The community is very aware of that and really doesn't like it, so it's not in your interest.
Doing this by hijacking top comments and threads about other people's projects is particularly not ok.
It's a clear indication from the community that you're overdoing the promotional links. The fact that you haven't really been participating in any other way accentuates that impression. Readers check these things.
It's fine on HN to post your own work (1) in places where it's relevant, as long as (2) you only do it occasionally and (3) are also participating in the community in the intended ways, submitting interesting articles and having curious conversation. But when users break these rules of thumb (and you've been breaking all three of them!) it crosses into spamming. The community is very aware of that and really doesn't like it, so it's not in your interest.
Doing this by hijacking top comments and threads about other people's projects is particularly not ok.