You think that fact that he fought against 4 tailed Naruto without the use of his arms, and easily survived, makes him weak? You're a fool.
Sasuke beat an Orochimaru that was practically on his deathbed.
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Not only could Orochimaru not use his arms, but his body was also beginning to reject him and just before Sasuke attacked him, Kabuto said Orochimaru was surviving on will alone.
The Manga > Your opinion. Get over it.