When we are tired, we are less equipped to handle life. Getting too little sleep can affect our emotional control and regulation capacities, as well as our ability to think a few steps ahead.
According to William Killgore, PhD, professor of psychiatry and psychology, and medical imaging at the University of Arizona, just one off-night can compromise your ability to "tap the brakes on the emotional centers of your brain".
That leaves you prone to overreacting in situations (bad or good). You’re more inclined to feel frustrated, hurt and oversensitive, or you may feel anxious and out of it.
When you are tired, every interaction may seem a little worse and this can chip away at your happiness.
So, before you quit your job, or worst, stay at a job you think you hate, try to significantly improve your sleep, and see if you wake up a newer, saner, brighter person.