That is your anger and composure. We get angry at times because of something that happened or perceive it as unfavorable to us. It happened in the past, and while you may have reason to be disappointed and displaced, why lose your temper? Who will that help?
When we lose our temper over something that has happened, we often find the misplaced anger now becomes the focus of the attention rather than the event itself. Suddenly we are labeled as angry and viewed negatively, even though the action against you may have been egregious, making your reaction justified. We may feel anger, but expressing it is the issue.
Then there is the anger of the future. If you are getting angry over something that has not happened yet, stop yourself and ask why. Why do you want to get yourself wound up over something you do not know will happen? It is also probable that what you think may happen won’t have the same severity you expect, so why waste good energy on negativity?
Be calm, and if you find you cannot because you are burning inside, stop and ask how you want others to label you and the purpose of your anger? Then, control the anger, but if you find it difficult, hold back and don’t show it.