Okay, here's the thing about deleting all of your content.
Deleting posts breaks the flow of the archived conversation and it makes our archive incomplete. This is a problem for the freedom of expression and information. But Art.17(3) GDPR includes an exception to the right of erasure for this situation. So posts do not need to be deleted.
However, profiles are not included in this exception. So they must be removed, but they can be pseudonymized. For example, we can replace your username with e.g. user89432 and remove all details from the profile.
If other posts contain the nick of the author of an anonymized post, that is considered a journalistic, academic, artistic or literary expression, so Art. 85 GDPR would apply. So, the right of erasure does not apply to that.
Bottom line: In order for us to protect the integrity and coherence of our community forums, we really only have to pseudonymize your account upon your request for deletion.