>>100291223That's the point. Goku thought that rage bursts were part of Cohan's character and that Gohan liked to fight as much as he did. By forcing him to battle, Gohan would grow more and enjoy himself.
He was wrong. Gohan doesn't like to fight. He didn't want to fight Raditz, Nappa, Vegeta, the Ginyu forces or Freeza. He did it because he had to, but all the time he was a scared child who didn't want to be in that situation.
In the Cell fight it was even worse because Gohan was convinced that Goku could defeat Cell, then Goku gives up, powers up Cell, forces him to fight and then sits back while he's being beaten up. Gohan was confused and sad, not angry. Only when 16 tells him that he has to give in to his anger to save the world he starts fighting, THEN Gohan goes OoC by turning into a sadist and torturing Cell.
Everything up to that point was perfectly in character for Gohan.