What were the gladiators unhappy with?

Gladiators could be content with only one fact. The fact that he is still alive today. The gladiator could not be satisfied with everything else. Almost all gladiators were from among the captured warrior slaves. They were not forced to work in the field. Many were very popular among the people. But they were taught to kill. They fought deadly duels. There was a certain number of citizens convicted of serious crimes. Such gladiators had privileges. If they survived for 3 years, then they received a pardon. A number of gladiators were free citizens. They just earned money and fame at their own peril and risk. The question of discontent in this case is doubtful.