In an interview with Vanity Fair, Eric actually revealed that Hannibal hadn’t wanted to be part of the new season at all — in fact, he had to convince his friend to say goodbye to the viewers on camera! Apparently, when Eric had called Hannibal with ideas for the new season, he revealed that he no longer wanted to be part of the show.
“He was like, ‘I don’t know, man. We’ve been doing it for a while. I’m down to keep collaborating, I just don’t wanna do the show anymore,’” he told the outlet. “I was heartbroken. Devastated. … The more I tried to talk him into it, the more I could tell he was pushing away.”
When pressed further about why his friend wanted to leave, Eric respected Hannibal’s decision.
“He’s evolved and become very, very, very successful,” Eric continued. “I’m proud of him, so I totally get it.”
Hannibal still hasn’t commented as to why he really decided to leave the show, though he tweeted about the many speculations made by viewers since his final episode.
“I’m seeing a lot of speculation and commentary on why I left the show but EVERYONE has gotten it wrong,” he tweeted. “It’s pretty fascinating to see.”
It looks like we may never know why Hannibal actually left the show.
Source : https://www.distractify.com/p/why-did-hannibal-quit-eric-andre-show