What term defines an individual who is dissatisfied with the existing state of affairs?

The term "malcontent" specifically refers to an individual who expresses dissatisfaction or unhappiness with the current conditions or state of affairs. This dissatisfaction often drives a person to voice their concerns or take action in hopes of achieving change. Malcontents are typically critical of the status quo and may seek reform or improvements, which aligns with the idea of questioning and challenging existing systems or norms.

In contrast, the other options reflect different attitudes or characteristics. A reformer might seek change but does so with a proactive approach, focusing on improving conditions. Mediocre describes an average or subpar quality that does not necessarily convey dissatisfaction but rather a lack of ambition or excellence. Content, on the other hand, signifies satisfaction with one's circumstances, which is the exact opposite of what a malcontent feels. Thus, "malcontent" stands out as the term that captures the essence of dissatisfaction with the existing state of affairs.