I wouldn’t say naive, but definitely reckless. And I would 100% say they portrayed her as strong in the tv series. Hell, it begins with her on an incursion on the remains of angband, which if you know the lore I’d say it’s pretty badass. Her arc in season 1 was about how she was so blinded by revenge and recklessness, that she couldn’t see the evil in front of her. Which is pretty fitting for a noldor elf. It shows that even trying your hardest to make good, your actions can and will have unintended consequences, even ‘evil’ ones. Which perfectly sets up her eventual rejection of the one ring, during the mirror scene in fellowship of the ring. She knew then she’d have good intentions using it, but she also knew more evil will come with that