[VGltZUNvbnN1]

I think the main problem most people have when deleting their discord accounts is that their public messages are still available to read for everyone just with the username "Deleted User" instead of your own. So it's still pretty identifiable the only way to get rid of them is to delete them by hand or with https://github.com/victornpb/undiscord . Discords rate limits are pretty harsh so with a lot of messages it's gonna take a while 1500 worked without getting timeouts.

[searchableguy]

What's worse is your unique ID is attached to the deleted user. The only thing you delete is the username which you could have done so by changing it to a generic one.