Yeah as much as I understand wanting them to be hurt by you leaving, in the end this is the online equivalent of a Karen saying "you just lost a customer!"
What if everyone didn't delete their accounts and just left them tog ather just and take up a fraction of resources. They'll get purged soon enough. Make them do the work.
That’s pretty much what I was doing. I was a huge lurker anyway, so just there to clog shit up. Left feedback on the Reddit app and uninstalled that though.