When you interact with someone that is in a bad mood or is angry you might find at the end of it that you feel bad too.
That’s what happens when you take on other peoples stuff.
It might seem that when someone directs anger and frustration towards you that you have to take it because what else can you do. But you always have options.
If someone asked you if you wanted to feel bad I’m certain the answer would be no. You have to keep that decisiveness when interacting with someone that’s angry.
When you learn to do that you’re not so effected by how the other person feels because that’s not your stuff and you don’t need to take it on.