This discussion could go on forever because Kishimoto sometimes give an explination for something only to contradict himself later which leaves us confused most of the times.
Asuma: against Kisame he looked weak, and at the extension of his knife, it didn't look like he was using Wind but instead it was pure chakra. Now kishimot has us believing that he uses wind to extend it. And now, he's supposed to be some important NInja and a member of an elite 12 guardian group in which all the members are strong.
Kakashi: Mange Sharingan was supposedly a technique only a true Uchiha could master but now Kakashi seems to have it.
Naruto: HIs stupidity moments seem blatantly forced. You mean to tell me all this time naruto has been using Kage Bunshin and not once realise that the bunshin's experience transfer into him.
Bijuus: they are suppose to be monsters that nobody can control and posess more chakra than a human. But they are taken down by the Akatsukis really easy.
Jiraiya: Combining elements are supposed to be a thing that only a bloodline limit permits you to do and yet Jiraiya used Mud which is the combination of earth and water. And he used Fire. what does that say??