Reddit will cheerfully disregard personal requests. Unless you can spend significant resources for a lawsuit, but even then chances are lower than using existing legal frameworks where available.

Have you tried? Are you trying to just delete the account, or your content?

Curiously, this help link does not list editing/deleting posts as prohibited, but there is a method to reach out to a human for assistance.

Another non-reddit page claims that you can edit/delete comments/posts when suspended.