As the event unfolds she makes more and more mistakes, even though I don't think it's entirely her fault because Jeffrey pis*** me off as well, undermining all her plans.
After he came to pick her, his only concern was about her safety, I don't understand why people keep talking about him overstepping the boundaries and grounding her, she got confined to the estate, not the house. She could go wherever she wanted within the dukedom, and could invite anyone to her house. And about the ring, he was angry because she gave it hoping they would just be done with it and go away. But it's not Korea giving it to the bandits could've just made them lose interest in attacking carriages and kill the servants to kidnap the wealthy noblewoman with rare pink diamonds. He got pis*** because she didn't think about her own safety as someone who just leveled up to be the wealthiest Duchess. One of the most important people in the Kingdom/Empire akin to a princess. It's a position that comes with countless rights, but even more duties and dangers. She needs to be more aware of it. But instead of reflecting, she's sucking. It just takes an "I'm sorry for putting myself in danger and from now on I want some nights to escort me outside when i go out."
If I were a Duchess I wouldn't go out without powerful knights, even if I had magic powers. Bad people do bad things. Being careless because you think nothing will happen, is just giving yourself in a silver plate.
That's what pis*** me off by most female leads in those manhwas, they just learn after being hurt to the point of dieing.