Sasuke Uchiha was someone who after itachi death and the learning from madara (tobi) was shattered.Sasuke thinks he may adopt decent in battle but in real life he can't when he saw his parents death he didn't adopt quickly when he was paired against gaara and trained for one month and seeing Naruto beating him while he was down defeated was angry when he left konoha he was beten by Naruto who uses 1 tail chakra and now beating and learning truth about itachi would not make him adjust . What he wanted was something for which he can learn fast so that he can change his fate because that's what his inner desire is .
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At that moment something changed inside Sasuke within him which would shake the foundation of shinobi itself.