1) Boredom 2) Complaining 3) Condemnation 4) Depression 5) Disappointment 6) Discontent 7) Disillusionment 8) Displeasure 9) Ennui 10) Letdown 11) Tedium 12) Unrest 13) Unsatisfaction 
• (n.) The state of being dissatisfied, unsatisfied, or discontented; uneasiness proceeding from the want of gratification, or from disappointed wishes and expectations.
Dis·sat`is·fac'tion noun The state of being dissatisfied, unsatisfied, or discontented; uneasiness proceeding from the want of gratification, or from disappointed wishes and expectations. « The ambitious man has little happiness, but is subject to much uneasiness and dissatisfaction .�...
[n] - the feeling of being displeased and discontent
noun the feeling of being displeased and discontent; `he was never slow to express his dissatisfaction with the service he received`
the state or attitude of not being satisfied; discontent; displeasure. · a particular cause or feeling of displeasure or disappointment: many dissatisfactions with the plan.
the feeling of being displeased and discontent