The bottom line is learning how to prevent excessive and unreasonable anger, dangerous anger. Learn your own anger pattern so that you can prevent smoldering anger or blow-ups. Anger-prone people often feel they deserve special consideration from others and become highly irritated when they don't get it. Talk to an offending person when you are both calm and in a reasonably good mood. I go home tired and discouraged.
Nothing works all the time.
Just try to be objective and say how you feel about things. Calmly let others know what your needs are. Realize that no one ever wins a power struggle. You can't always help being around obnoxious people, but you can control how you react to them. You are the boss of your emotions and responses.