Shreddit and PowerDeleteSuite were last updated years ago. I’ve used redact.dev which can also edit your comments to random strings before deleting them as “deleting” on Reddit doesn’t delete anything but only hides it from public view.
I’m now also doing a manual pass by using a Google search for “mbirth”
(incl. quotes!) followed by site:reddit.com
and a date filter for everything of like 10 years ago and then manually delete all the comments the deletion tools didn’t catch via the API.