Flamma had tasted losses several times in the past.
However, these losses weren't earned from those who were the same age as him.
He would often spar with the Orc Warlords, on a regular basis in order to hone his fighting skills. Of course, sparring had its limitations because the Orc Warlords were not going all out because they were afraid that they might accidentally injure him during their sparring matches.
Because of this, Flamma didn't really understand what it means to really fight against strong opponents.
The young Orcs that he had beaten, although strong, were still weaker than him. This made him feel unsatisfied most of the time.
Fighting monsters was also an option, but since there were several people who were assigned to protect him, he hadn't really encountered a situation where his life was truly on the line.
He was equipped with Pseudo-Legendary and Legendary Equipment that had many ways to preserve his life, like the one he used against Cethus earlier.