Basically at the mercy of their moods.

We can take classes in school to learn how to control our finance, our careers, and even our overall successes, but who do we sign up for Attitude Control 101? A psychologist at Case Western Reserve University surveyed more than four hundred men and women, asking them what they did to control their attitudes. Nearly all of those surveyed said they were basically at the mercy of their moods. The same study found that the emotion most people had the greatest difficulty controlling was anger. Not much of a surprise there. Some people's lives are virtually controlled by inner rage. Their attitude are expressions of that rage. They have hair-trigger tempers. They are easily offended. Staying on their good side is a high-wire act. As a result, they often have few lasting relationships.
People who are quick to anger often feel regret after  they've experienced a blowup. "I'm sorry, I just lost control," they'll say. But these troubling emotions can also be swept out.
Your attitude is your responsibility.