Answer
Sadly, you can’t delete your PSN account in the same way that you would delete a game from your library. To play a game, you must always have a local PS4 user account connected to at least one PSN account if you want to play online. So to delete the PS4 user account go to Settings then Login Settings.
How To Delete PS4 Accounts
How to delete PS4 account
Sadly, you can’t delete your PSN account in the same way that you would delete a game from your library. To play a game, you must always have a local PS4 user account connected to at least one PSN account if you want to play online. So to delete the PS4 user account go to Settings then Login Settings.
Deleting a primary PS4 account requires an option to have a secondary one set beforehand. To delete the account, go to Settings > Login Settings > User Management and select the user you want to remove from that list.
All content purchased using an account will be lost once the account is terminated. This includes authentication for any subscriptions, which means you will lose access to all entitlements associated with that subscription.