I read the whole thing and all I came away with is that basically no one has a fucking clue if it applies, if it does apply technically does it even matter, and if it does matter how it’s supposed to work without fucking up the site.
Most of the deletion requirement for a user could probably be satisfied by removing the username from the posts. And not just for display, but in the db. If the data can't be recalled for a user, then (by my reading) that clears the GDPR requirement.
I posted that (I'm vgf). My account was rate-limited and the post was very clearly artificially pushed to the second page, then the third. Just minutes before that it had started to climb up the front page relatively quickly.
Your account was rate limited before you posted that, and the submission dropped in rank because it set off the flamewar detector. Moderators didn't touch it.
You have a long history of—among other things—breaking the HN guidelines, ignoring our requests and warnings to stop, getting banned, creating new accounts, and posting false statements about HN moderation. I mention that because readers have a right to hear true statements about this and not just the false ones. I don't mind being criticized for mistakes we actually make—it's good to be, so we can correct them—but spreading outright lies destroys this community by undermining its confidence in the site. That's not ok.
Since you obviously don't want to use HN as intended, I've banned several of your accounts.