Why isn't Charles...?

Why isn't Charles a Genius? He fits the definition of "having an illogical philosophy" with his contrarian personality and wanting to leave the game when he wasn't excited enough. He's also insanely good for a 15 year old compared to Niko, Nanase and Naruhaya. The fact that prior to his awakening he was already comparable or better than his peers who are older than him like 18 year old Ness or "Played since birth" Hiori defies all logic. I feel like the only Reason Kaneshiro made him a Talented Learner is because he has Metavision.