I used Power Delete Suite the other day. It takes a while to run because it’s scripted vs using API. Instructions were simple and easy to use. Just let it run in a tab in the background and eventually it will work through all your posts or comments. I set it to just edit all my comments. If you leave the text box empty for what you want it edited to it will put random comments in, such as I like coffee. I like hiking. I like reading. I like beer. Etc.

Power Delete Suite

If you search for delete all comments you can usually find some js, or greasemonkey pattern, or script, etc.

I’ve had success using random howtos there. This new TOS change is news to me and I may delete everything again, will share what I used if/when

I used a command line tool that I can’t remember the name of and a quick search isn’t bringing up but I’ll edit this comment when I’m at my laptop.

Edit as promised: I used shreddit. I did come across that while searching earlier but the name didn’t ring a bell.

Be warned, if you search for shreddit there is a paid tool of the same name. That is not what I used.

The tool I used allowed me to give it a GDPR download to nuke everything.

I’ve heard good things about Power Delete Suite too.