Although my education is in biology, I believe an answer with the science is ultimately useless. I believe a moral/philosophical answer will serve the OP better.
You desire justice; justice is a good and know something was done wrong. Consider the account of the Gospel where Jesus seeing his Father’s house set up as a marketplace. Let us read from the second chapter John’s account of the Gospel:
13 And the pasch of the Jews was at hand, and Jesus went up to Jerusalem.
14 And he found in the temple them that sold oxen and sheep and doves, and the changers of money sitting.
15 And when he had made, as it were, a scourge of little cords, he drove them all out of the temple, the sheep also and the oxen, and the money of the changers he poured out, and the tables he overthrew.
16 And to them that sold doves he said: Take these things hence, and make not the house of my Father a house of traffic.
17 And his disciples remembered, that it was written: The zeal of thy house hath eaten me up.
This is anger considered rightly. This is anger with a good and justice object (zeal for his Father’s house). The rest of us faulty humans rarely can so purely seek justice, but regardless let us consider this act of anger in respect to all other acts of anger, just or otherwise.
We mentioned at the start that anger is a reaction to a lack of justice. Justice is a certain kind of equity in respect to something that is due. In the case of the money changers it was the due worship and respect owed to the temple of God. Sometimes its something as small as someone not performing certain civil niceties when they see you in the morning. Sometimes it is something large such as desertion from the armed forces of your native country which you swore to protect.
Sometimes however, as is obvious with any experience of human nature, anger goes wrong. There are two ways that anger can be perverted. Firstly, anger can be inflamed against a perceived offense, but the offense was not in itself actually unjust. Perhaps the person annoying you is earnestly not trying to do so on purpose. Perhaps it is not a proper thing to be become angry over. In such a case, the reaction against the perceived injustice is actually an unjustice in itself. It is quite paradoxical, but altogether human, that someone can react against a perceived issue of injustice and have the reaction be unjust itself. This is the essence of all bickering and tattle-tailing.
Secondly, anger can be inflamed against a perceived offense, even a just one, but the reaction can be inappropriate. Consider if Jesus, instead of braiding a whip of cords and driving out the sellers and money changers, seized the weapon of a temple guard and proceeded to kill the sellers and money changers. Aristotle says that virtuous actions are a balance on the Golden Mean between doing something too much, and too little. Consider eating. Eating itself is morally neutral, but can be perform immorally either by eating too much (gluttony) or too little (anorexic self-hatred). Same with anger, we can react to an injustice too much (vengefulness) or too little (apathy).
Thus we see anger for what it is and in how it arises in the human soul. It has been said that anger is actually one of the least moral faults that a man can have. Anger is really just a misplace sense of justice. With the grace of God this can be amended. Consider St. Paul, that before he became a premiere apostle of the Lord, most zealous for the kingdom, he justly aspired to kill the followers of Jesus. At its core unjust anger is merely a lack of discipline in one’s reactions. There is hope for you too.