Itachi has nothing that can beat Obito, and he knew it. That's why Itachi never lifted a finger in 10 years.
Itachi was under the belief he was Madara. Obito was clearly seen saying he was fortunate that Itachi didn't know otherwise. It's how ppl use that belief as "proof" he knew he couldn't beat the dude when there was a clear case of mistaken identity going on. Using that logic, Kisame couldn't beat him because he didn't do anything to him.Itachi has nothing that can beat Obito, and he knew it. That's why Itachi never lifted a finger in 10 years.
No he wasn't. He already knew Itachi was a spy for the leaf. He didn't do anything about because he was scared and needed Itachi's help