here i give you few reasons as why the majority with me, hate her as a character in the series
1= Useless for the first 225 episodes of naruto, not shippuden, even in the second part she maybe did 2 useful things
2= Even tho she trained under tsunadi, she still showed no major feats in the war, just healing with other random healers
3= lost purpose in the story , no longer needed for healing concidering naruto now
4= Could not do the most important task in the full manga aka destroying his eye
the list goes on, that character is just filling up the white spots in the page.
1. wow even during the zabuza arc, she's the one that stood protecting the bridge guy. She was still needed for the task, no matter how trivial it was. Saved naruto and sasuke from death in the forest of death TWICE each. Was intelligent enough to help carry her team thru the exam part of the chunnin exams WITHOUT cheating. In the second part she saved kankuro's life. saved chiyo's life. help take down sasori (even solo'd the majority his 100 puppets without a scratch nor help from chiyo). Now i'll stop there because by "2nd part" i'm assuming you're talking about in the first part of shippuuden...
2. No major feats in the war??? Stored chakra in a fine point consistently for 3 years (EVEN while fighting sasori), something only Tsunade has been noted to do. If it were that simple, Shizune, Naruto, etc would have done the same. Took down the most juubi clones in a single strike. Held her own in the war by keeping the alliance healed BEFORE Tsunade arrived. Kept naruto alive long enough for obito to help. Healed naruto after the 10 tails first resurrection. Was able to figure out the secrets of white zetsu and was able to disable one in a single strike. I'll stop there for now also.
3. Lost purpose in story? yet the entire theme for the past chapter and upcoming chapter is "Teamwork". It's not about what she can do alone, but sometimes it's about how she contributes to the balance and completion of team 7.
4. It's not that she could not do it, it's because she had a lot of questions. Also, if she had destroyed the eye, Obito might not have had the strength to kamui her back to the NV when Madara came for it. There's a reason Kishi did not make her destroy the eye. For the sake of the plot. It would be the same if it were Naruto/Sasuke/Kakashi/etc.
so if the majority (including you) really fail to realize these manga facts...well...i guess it's to be expected.