So I finally managed to figure it out and let the gdpr run for 3 days.
After day 1 I figured out without the gdpr folder, you can only delete a certain amount, 100 I think.
The rate limit is also set to 30/min (sleep 2s between actions) so I managed to get two instances running at once without hitting the limit.
One gdpr deleting from 2010 onward, one with an auto-typer hitting f3+enter ever 2 minutes 21 seconds to delete from 2023 backward.
Took another 2 days but I managed to delete my old profile. Googling will bring up a few archived posts on other websites, and name mentions but no posts, and the random sampling I did showed nothing when I tried checking on the individual comments.
So it took me a bit to figure out, but I managed.
They definitely assume people have a certain level of knowledge of things when doing the documentation, but luckily it’s easy to find information.