The Champions were called champions for a reason, because they had won many battles over the course of thousands of years. Calva knew a lot about fighting and one of the most important things when heading into a battle, was to believe that there was a way you could beat your opponent.
When Calva had seen Quinn, he believed that they had a chance, a chance to get rid of Immortui, especially after seeing his strong demon form, and now he was hearing these words, the words of someone who could never win.
'Was I wrong… was I wrong to put hope into this person, who has given up already.' Calva felt like he had made a mistake, and with it, his life was over. He had rebelled and attempted to attack Immortui, who had made it clear that he was not to attempt to do such a thing or face the consequences.
He had already attempted once again in the past, resulting in him being chained up. Doing so again, he could only imagine what the punishment would be this time.