Related words: feeling disgruntled, be frustrated, be disgruntled with your job, how to be disgruntled at work, be disappointed in your work, dissatisfied with your work, be mad at your job
Related questions:
What do you feel when you are disgruntled?
What are the signs that you're feeling disgruntled?
Does being disgruntled affect your health?
Does being disgruntled make you more?