Resentment
I have gone for months, and in one case years, frustrated about things that might have been mutually understood had a single well-reasoned discussion occurred. But the other person used anger to preclude discussion … because they didn’t feel they had the time for it … they lacked the desire for it … or … they harbored some deep resentment toward me, I am not sure which is was. What this has taught me is that continual unwillingness to accommodate communications … much less another person’s need … brings about resentment.