Can I delete my account and everything in it?

Yes, and you do it yourself. Open your account page and use the "Delete account" section. There is no form to email, no survey, and nothing to hunt for.

It removes your pantry, shopping list, meal plans, saved recipes, usage history and profile, and then deletes the sign-in identity itself.

One deliberate exception: recipes you published to the community are anonymised in place rather than deleted, so other people’s saved copies and collections do not break. The account page says so next to the button.