Disappointed is a kind of feeling when someone feel "Sad or displeased because someone or something has failed to fulfill one's hopes or expectations" as explained in Google dictionary .
I am having this kind of feeling right now. It is not because of I failed to fulfill the hopes or expectations of other people, but myself. It is kinda ridiculous. Although I had paid hard works on it, the outcome still far from what I had expected. I feel helpless.