I think thats pretty much the case I think he had the right idea make itachia true hero, but his execution was a bit clumsy hence itachis seeming mistakes in judgement that nearly undo all he wanted to have happen.
Itahci to me is supposed to represent ture honor and sacrafice. the noble shinobi sacraficing all he knows and loves to protect his baby brother and his village. a true samurai.
But the story execution leaves him looking somewhat foolish in his ideals and methodology to the point where you wonder why he didnt just kill danzo on the spot and accept execution as punishment with his sole request being that the clan and village make peace.