there are several reasons unhappy lot of dont know how to enjoy their life they always expect more than things what they have now that is the main reason for people are unhappy lot of people dreaming about what they havent. and also some bad feelings cause to the people unhappy
in my opinion, it is because they are not contented so that it leads to unhappiness.
Contentment depends on people. Sometimes people already have enough but still isn't contented. Greed makes us feel that way. To be truly happy them we must remove all negativity around us. Greed, pride, these feelings more often than not results in disappointments and unhappiness