1If your break turned into disappearing for the night, look at it as fear rather than as a discipline problem. Anger is often a way out of feeling afraid, and so is running.
Shame teaches badly here. Telling yourself you failed at the skill tends to produce more heat, and heat is the thing you were trying to leave behind. Ask instead what you were afraid of hearing if you had gone back in, because that is what the practice actually has to get around.
Islamic evidence
If Satan should prompt you to do something, seek refuge with God (Quran 7:200). When the urge to run arrives, the move is to turn towards God, not to turn on yourself.
“If Satan should prompt you to do something, seek refuge with God- He is all hearing, all knowing”
Qur'an 7:200
Psychological evidence
In a randomised controlled trial with forensic mental health patients, anger management built on acceptance and commitment therapy lowered scores for anger rumination and impulsivity. That is a particular and unusual group of people, so the size of the effect will not carry over neatly to anyone else. The direction is still worth having: an approach that asked people to face what they felt rather than fight it did shift anger.
Polat H, Asi Karakaş S. (2021). Perspectives in psychiatric care · doi
Review detail
Why it works. You can look at something honestly once you are not busy defending yourself against it.
When not to. If vanishing is how most of your difficult conversations end, and has been for years, that is worth working through with someone rather than alone.