You walk into the room. His in a fury. His angry at himself for messing up again but talking it out on the world. You upset too. His let you down again after promising never to do it.
You do have a choice. You can remain composed . You do not have to mirror their emotion.
This wont fix it, but it wont make things worse. Do not attempt to sort bad things out from a terrible emotional place. Get to a plateau, a calm and build from there. It has a more solid foundation.
Waiting and patience is a functional, despite the rush of the world.