She has a weak personality. She decided to kill Sasuke but failed and even though Sasuke tried to kill her, she can´t still make up her mind on who she would save first on the Naruto vs Sasuke battle. That is just dumb. She has some skills but how can you compare her to Kushina or Tsunade. They unlike Sakura have strong wills. You see how Kushina died protecting the village and how tsunade has risked her life over and over. All Sakura did thats worth mentioning was the Sasori battle. Yes she is helping out in the war, but so is every medical ninja out there. So IMO no real feat to even compare her to the greats.
1. her personality isn't weak at all. saying her personality is weak because she cares for her teammates more than anyone else does isn't weakness
2. she said that (or thought that) in a filler, if i can remember correctly
3. Sakura has a very strong will LOL what are you talking about? as if the will to live against sasori isn't enough...as if the will to go and kill sasuke herself isn't strong will...as if the will to live in the forest of death against the sound ninja isn't enough...as if having the balls to run an entire hospital while the village is under attack and she's only 16 isn't showing strong will...
4. kushina only died protecting the village because she was in the right place at the right time. sakura would have died for the village also, when fending off the peins from pein's attack on konoha. she put her life on the line there. she put her life on the line to save chiyo and potentially save naruto from getting taken by akatsuki. the difference between her and kushina is that sakura is still alive! hello!
5. i wonder what kinda feats someone would have to have to compare to madara, itachi, hashirama, naruto, etc when, like i said before, she has virtually nothing but healing and super strength. no kekkei genkai. no special last name. not even on screen parents for support. no powerful elemental ninjutsu. no genjutsu. if you truly think she hasn't done anything meaningful since fighting sasori then you're obviously conveniently forgetting important parts in the manga