I’ve tried a few sketchy sites but they either demand my login or break within a week. Is there actually a consistent method that doesn’t require handing over my credentials?
You shouldn’t give your login info to any third-party sites—they can steal your account. There’s no official Instagram way to view Stories anonymously. If the account is public, you can make a second (private) Instagram account and view Stories that way, but true anonymity isn’t possible within Instagram’s own app.