There are people who do not want to hear what you have to say unless they ask.
If you try to tell them something, they silence you or ignore you or say they are busy. It doesn’t matter how important it is, how it effects them. They don’t want you to tell them anything because to control everything in their environment is their mandate.
When you meet someone like this, use a lot of social distancing.
Never speak to them, never tell them anything. Ignore them as best as you are able. If they speak at you, one word responses or a nod.
Never try to talk to them because they will insult you. Insult is their prime form of speech.
Here is a person you should not even know; why are you making yourself a victim? Further, to participate in their insult exchange means you lose; for you have descended to their level.