It would be a shame to see you go. If you are experiencing difficulties please submit a support ticket or send us an email at firstname.lastname@example.org, perhaps we can help!
If you'd still like to delete your account, please create a support ticket anyway with your details and just a brief line on why you want to close your account, if you don't mind sharing. We really value your feedback as we are always looking for ways to improve.
Once your account has been deleted your profile will no longer be visible however public data that you have shared, and consequently has a DOI will remain visible - just not linked to a user.
Are you an institutional user?
If yes, the above does not apply - please contact your University administrator. If you don't know who that is just login to the support portal and submit a ticket, a member of the figshare team will be happy to point you in the right direction.