Self Pity
Self-pity is an emotion "directed towards others with the goal of attracting attention, empathy, or help" and one in which the subject feels sorry for (feels pity for) themselves.
Feeling sorry for yourself can be downright self-destructive. It makes overcoming adversity difficult—if not impossible—and it keeps you stuck.
Mentally strong people refuse to allow self-pity to sabotage their goals. Instead, they use life’s inevitable hardships as a way to grow stronger and become better.
While looking into the science of psychology, the personalities that mostly respond to experiencing self-pity are moody and most likely experience feelings of anxiety, anger, loneliness, etc...
In other words, people that are seen as mentally unstable are more likely to have self-pity for the most of their lifespan.
There is also evidence that the effect of self-pity can depend on gender, with women being more vulnerable and more likely to go through with that cause.
The focus of where self-pity could rise could come from their past failings or losses and as a result could break down the mind of a person. These people in question could repeat the cycle and continue to beat themselves down to further their pain.