Sorry, I was incorrect earlier on, you can have your account deactivated without all your posts being deleted.
Content will only be removed if your account is deleted by applying a ban, as is done with spammers.
Unfortunately, I cannot do this as I don't have the necessary rights, only @Tripredacus or @xper have the necessary powers.
One of them will have to explain what options are available, especially if you don't want your name to continue to appear on your posts.
Also the issues around GDPR for those in the EU.