That's funny timing someone just linkedhows somewhere else

Here's a link

https://lemmy.ml/post/1259772

Maybe PowerDeleteSuite works for you

I've done something similar using the Violent Monkey extension for Firefox, RES (to load all of my comments on a single page), and a script I found on Greasy Fork. That script was supposed to replace comments with gibberish, THEN delete everything, but I hacked the deletion part away and changed the gibberish edit for a custom text. Let me try and fix it so I can share it with you (unless someone with a better solution shows up).

I used power delete suite. It also let's you save a copy of all the original comments with their permalinks in a CSV.

https://github.com/RudeDude/PowerDeleteSuite

You may need to run it more than once. I think due to rate limiting from reddit for many edits like this.