Board Thread:Theories and Speculation/@comment-24120130-20150429143032/@comment-6769189-20150429203459

Sasuke never beat any of his opponents on his own

Orochimaru was weakened

He sacrificed Manda to save his own skin from Deidaras suicide bomb

Itachi died of exhaustion/disease

He barely held his own against the Kage

Sasuke got unwilling help from Karin

getting Itachis eyes is a similar power up to 9-tails chakra