You can’t avoid the moments of dissatisfaction or anger at someone else’s actions. At times like that, your mood is uncomfortable and your mind is not clear.
At that time, you are very easy to speak out harsh words, even cruel words to them. Your anger will pass away, you may not even remember and pay attention to what you said. But the listener can be very sad and hurt by your words.
Even those words could hurt them so much that it could leave a scar in their heart. That scar lasted forever in their lives.
So you should always talk softly and kindly with everyone. Or not, be quiet until the anger is over and you can calm down