Except...
The first time she's captured in Brulee's Mirror World it was due to not understanding or knowing the nature of Devil Fruits and how hax it was. Considering Luffy was fighting a mirrored version of himself...
Second time was part of a plan by Chopper, which wasn't even her. Basically doing this they took over the Mirror World, which was essential in all the things the Straw Hats would do prior to the Wedding.
Third time is inexcusable, but in her defense, Sanji had trouble with Daifuku and was actually pinned down by him during the Tea Party.
Fourth time was Katakuri, nuff said.
Fifth time was due to the after effects of the Sulong transformation where she was exhausted due to the nature of it. Its excusable in this circumstance since she basically took out Daifuku's fleet who were about to attack them as Perospero had led the ship into a pincers.
Sixth time was intentional because while the plan started as saving Momonosuke, Big Mom was pursuing them, so both Nami and Carrot acted as bait so Shinobu could attempt to rescue him undisturbed. Also, Yamato didn't save Momo, Sanji did. He just had trusted Yamato to protect them because he knew they'll need someone strong to protect them.
Right now she's about to fight Perospero. Don't know how well that's about to go, but she better have a plan or some heat related counter to his candy powers or it'll be a quick flight. Considering Nami and Usopp are about to fight Ulti and Page One, we can only assume that their skillset will be ultimately shown.