But then people have the audacity to say that Naruto beat Kakazu and Pain with all his hard work! The Pain match was his best performance, so i won't discount him of that victory. Kabuto was behind all the other character in terms of power: Naruto, Sasuke, Kages, Tobi, etc... The only reason he got that strong is by injecting himself with cells from other ninjas. If i give Sasuke "Edo Tensei" as a free power-up with Rinnegan who win the battle? Would you still say Kabuto> Sasuke? Sasuke admit in the fight to Itachi that if they don't take out Kabuto. The match is only going to intensify itself, so that's why he wanted to kill Kabuto in the fight. To avoid further complications from Kabuto. I never discredit Kabuto for being weak, despite stealing powers to get there. He was strong against Sasuke and Itachi, but he had all the advantages in the world and still failed to defeat both of them.