In poetry other answers to anger, trying to find some that fit, and enjoying finding new poets, happy with what I find:

Sapphics Against Anger
BY TIMOTHY STEELE
Angered, may I be near a glass of water;
May my first impulse be to think of Silence,
Its deities (who are they? do, in fact, they
Exist? etc.).

May I recall what Aristotle says of
The subject: to give vent to rage is not to
Release it but to be increasingly prone
To its incursions.
[…]

I did not write this poem — in anger. By Joel Dias-Porter

I did not write this poem
in anger,
I did not write this poem
in “Self-Defense.”
I did not write this poem.
Because my pen is empty from
having already written & written this poem.
– Joel Dias-Porter

Minnie Bruce Pratt
Justice, Come Down

[…]
I can smell my anger like sulfur-
struck matches. I wanted what had happened
to be a wall to burn, a window to smash.
At my fist the pieces would sparkle and fall.
All would be changed. I would not be alone. […]

From Violence to Peace
BY JIMMY SANTIAGO BACA

…I drove to Felipe’s house,
anger knotted in me
tight as the rope tied
to the stock trailer
steer strained against.
I pulled, but could not free myself. […]

“Felipe!” I yelled, porch light
flicked on, illuminating the yard.
“Came to fight,” I said, “take off
your glasses.” […]

First shot framed darkness round me
with a spillway of bright light,
eruption of sound, and second shot roared
a spray of brilliance and the third
gave an expanded halo-flash.
My legs woozed, and then
I buckled to the ground.
(I thought, holy shit, what ever happened
to the old yard-style fight between estranged friends!) […]

…During my week in bed,
pellets pollinated me
with a forgotten peace,
and between waking thoughts of anger and vengeance,
sleep was a small meadow of light,
a clearing I walked into and rested. Fragrance of peace
filled me as fragrance
of flowers and dirt permeate hands
that work in the garden all day…