Itachi doesnt have talk no jutsu, nor infinite chakra.
He pushes you and all your shit away the moment the fight starts. And all the long range shyt you throw he absorbs. Pluss all he missiles he shoots(im sure is avoidable) but time consuming.
And again, why did it take Naruto/Bee/Itachi to seal the one Nagato. (i understand sealing is kinda harder than killing but w/e).