You have around 4,500 posts that'd be a lot of work so I won't remove the content. If you're trying to terminate your account I'd hate to lose all the posts you've posted I'd be willing to get your password & email changed upon a formal request and change the name to something unrecognizable and profile picture if possible. (No promises) However it doesn't seem as though you want your account terminated. If you'd like we can delete your account.
If it's due to your previous postings I would just move on it just shows you've progressed as a person.