How to Delete Pinterest Account?
https://howtodelete.org/delete-pinter...
As it turns out, you can’t completely delete your account on Pinterest. Instead, you can deactivate your account, which removes your profile and pins from Pinterest and puts it in a state of suspended animation.
To deactivate your account, first visit Pinterest.com, click your username in the upper-right corner, and select Settings from the menu that pops up. Next, scroll to the bottom of the Settings page and click the Deactivate Account button.