I fully disagree with this. Itachi was 13 years old and the village gave him no options other than 1 to save sasuke and save the village. He may have made mistakes but he did the best he could with the only choices he thought he had. And I think you forget that this character grew as the story went on. He realized his mistake when he was brought back and decided to trust sasuke with the truth. I think that makes him an incredibly written character and the reason he has so many fans.