I remembered having a project group consisting of 3 "hardworking" guy and 2 "laid back" girls.
There was this case of conflict with a project mate a year ago. Unfortunately, I was picked as a project leader, and due to my lack of experience as a project leader, my mistakes was often picked on by one of these dudes.

I had my project timeline mapped out, but unfortunately, the guys were ambitious towards completing the project, while the girls were completely opposite. As a result of this, I had to initiate to assist the girls in coping with the project and re-assure the guys that our group is progressing smoothly.

This one guy got frustrated by the fact that I was being specially patient with the girls that he feels the team's progress was too sluggish. He ranted it out at me, I told him that it was my responsibility to look after every project members as a leader, so I urged his understanding on the matter. However, not only he refused to assist me yet complaint to my respective lecturer, he was all about saying "If people were to understand each other, then there won't be any progress in humanity" these kinds of illogical ********...

That swing me down from an elated state to a pretty depressive state of mind very quickly because I am someone that includes everybody in a team, does not matter who they are, but yet I couldn't reach an equilibrium.

It ticked me off that someone could just take another person's existence like a pinch of salt. Thanks to my high-tolerance anger level, he was so close to incurring my wrath.