adjective

not content or happy with something.

his parents are dissatisfied with the quality of tuition on offer

discontented,malcontent,unsatisfied,disappointed,disaffected,disquieted,unhappy,disgruntled,aggrieved,frustrated,vexed,annoyed,irritated,angry,angered,exasperated,fed up,resentful,restless,restive,disapproving,displeased,unfulfilled,regretful,cheesed off,browned off,brassed off,not best pleased,pissed off