Don’t avoid a good level of reliance on just pressing your lips together and composing a great and pithy reply in your head. That works almost as well as writing it down. If you’ve been eloquent enough yourself, you’ll find that you’ve used up all the emotion and can do a mental reset so that you can next find a more reasoned statement of the problem.
As a child, I wrote volumes of things that should never see the light of day. Instead, they saw the light of the gas flame and glowed brightly for a short time, burning up my feelings along with the paper.
I can’t do this well when driving. I become so absorbed in my thoughts that I get constantly lost. Luckily I’ve learned to be perfectly comfortable with not having the faintest idea where I am. I look at the positive. Even when I pass it several times in a row.