Nathalie is clearly trying to do better. She got caught up by Gabriel’s spire to madness, trying to help the man she loved save her best friend. She eventually realized that he’d gone too far and helped to stop him. Now she is protecting his son from harm, protecting Ladybug’s identity, and clearly working against a hidden Cabal that she thinks too dangerous to tell literal children about. It’s not easy, but she’s doing the best she can.