There's a big difference between "delete my account" and "delete all information you have on me". From people I've spoken to, there have been a lot of companies implementing the latter in order to be compliant.

A bit of weird one here, but thedailywtf.com. I wasn't able to find any sort of "delete my account" functionality. Not that anythings changed post-GDPR, but...

(The only reason I was reminded that I actually had an ancient account is that my password from there was apparently leaked and spammers tried to convince me that they'd gained control of something important. They couldn't connect the password to the site, obviously. It was just a leaked password database.)

Also, some companies merely "soft-deleted" user accounts. Simple flag on the user in the database

I could not delete my Discord account, for example, even talking with them several times by mail.