I found a plug-in for Firefox that deletes all posts and comments from your reddit account. (Power Delete Suite). Now I am in talks with reddit, to have them delete my account and data.
They say that all content will be disassociated when I delete my account but I had them confirm that they won’t recreate it when I have deleted it. They still say that they will retain the IP used for creating the account. Not sure if this is legitimate data redemption after I have asked for my data to be deleted according to GDPR?
If you have posts or comments on a sub that went private they won’t appear on your profile, and these auto-delete tools won’t see them. When (if) the subs go public your content will re-appear.
I’m not defending Reddit here but I think that with so many subs having gone private, this is at least part of the problem. I was upset initially when a bunch of my content was “restored” but I realized it was all from the same three subs that had opened back up.