Deidara negged a Kage, Itachi could neg all 5 if he wanted to yet Sasuke went 1v1against both and won
Only reason gaara lost to deidara was because he had to worry about his village it is even pointed out on the databooks.
You should read again the hokage summit because you might have missed the part where sasuke was getting ragdolled by the raikage (almost got killed only at the cust of Ay legs and saved by gaara)
was sofocated almost to death by mei (had to get saved by zetsu)
And was almost pulverized by onoki ( saved by obito)
And know what the most funny part in all this? Its the fact that it was MS sasuke and not hebi.