Hi. I would like to delete my account & all my topics because I no longer need this account.

You could of just PM'd an admin. Topics like these are useless and take up space in my opinion.

In short:
Send an admin a PM about your problem, request this thread to be locked and deleted. Problem solved.

No.

Why would we delete your acc AND posts if you don't need it? It'd just make the forum look weird, like, with missing posts.

If you no longer need the account, then you can just not use the account.