I am not a person who displays anger often but it doesn't mean I am not angry. There are several things that makes me feel this negative emotion.
The first thing that makes me angry for not any other reason is excess noise. When the noise in my surrounding increases, I start loosing my temper even on minor issue.
When my time is wasted for any reasons, I feel a kinda anxiety mixed with anger.
Mess in the surroundings also provoke the feelings.
The news of sexual harrasment cases makes me feel like killing all the culprits mercilessly.
Injustice in the world also induces the feeling.