The trick in keeping your relationship vibrant and healthy, is to micro correct towards each other, towards the join between you. By showing your partner you are willing to own and handle the little issues that come up during the course of a week, you are giving them assurances that you can do the same over the longer trajectory of your relationship.
It's hard when you're on the receiving end of someone else's trigger. But we can get better at identifying our own triggers and triggered moments. And there are ways to help our partners notice when the rage or sadness that is coming out of them, might be a bit bigger or deeper than the infraction that caused the initial pain.