People do not vent anger. People vent frustration. Anger is usually a follow-up because the person does not have a motion forward or solution to the frustratin

People do not vent anger. People vent frustration. Anger is usually a follow-up because the person does not have a motion forward or solution to the frustrating element. In my experience people vent their frustration because they are stuck in their thinking and instinctively want to share it with others in hope the trusted person can give a way out, or comfort them.