HN/YC cares more about community aesthetics than your right to be forgotten.
Try to have your account and its contents deleted. The best I was offered for my 2011-vintage account was to randomize the username, and the reason I was given was that browsing and old thread with a bunch of deleted comments "looks bad".
I agree with this policy, deleting comments isn't fair to all the other people who replied to that comment. I don't see how this goes against what I said?
I was responding to your statement that you don't like that your comments are the property of YC. I was elaborating on how they hold our content (that we author) hostage because it looks pretty.
Not wanting your comments to be property of YC but then also being okay with them refusing to delete your content doesn't make sense to me. Those seem like fundamentally-opposed viewpoints.
Now I'm thinking about it, I wonder what they do with GDPR deletion requests?
If comments here were for anybody to use as they wish, then anybody could use them for whatever they liked and (thus) YC could refuse to delete them. Being okay with both of those doesn't isn't a fundamentally-opposed viewpoint. One is a logical consequence of the other.