くじょう苦情kujou
1.
A feeling of dissatisfaction or discomfort arising from being wronged, mistreated, or subjected to unfair treatment, often expressed verbally or in writing.
2.
The act of bringing forward a statement or expression of one's grievances related to personal losses or inconveniences encountered in various situations.
3.
A deeper emotional response to enduring hardships or perceived injustices that prompt an individual to seek acknowledgment or resolution.
Example:
その顧客の苦情は微妙な問題に関わるものだった。