disgruntled (adj.)
- annoyed
- bad-tempered
- complaining
- crabby
- cranky
- cross
- disappointed
- disapproving
- discontent
- discontented
- disenchanted
- disillusioned
- displeased
- dissatisfied
- dissenting
- envious
- exasperated
- faultfinding
- grouchy
- grumbling
- grumpy
- ill-humored
- ill-tempered
- indignant
- irritated
- low
- malcontent
- moody
- murmuring
- opposed
- opposing
- peeved
- peevish
- petulant
- poor
- querulous
- rebellious
- resentful
- restive
- restless
- sulky
- sullen
- testy
- unaccommodating
- unappreciative
- uncomplimentary
- uneasy
- unfavorable
- unfulfilled
- ungratified
- unhappy
- unsatisfied
- vexed
- whiny
