Your user profile on reddit may not show any comments anymore but that doesn’t mean they’re all gone. If you want to purge your content, use the search engine of your preference to look for your username. I just spent four hours manually deleting a bunch of stuff that didn’t show up on my profile and that any automated solutions were unable to find during the last few weeks (not just because of blackouts). I’d be surprised if I won’t have to do this several times more.

Also, if you’re using Qwant, remember to go through all the languages.