Want to quit

Tired,painful to me for the work.Maybe,I can not satisfy the present situation,perhaps,I am not adult to face the trouble,or my life pressure is too hard to lost my encouragement... I do not know, I think you all should be happy everyday, but I do not feel.maybe,I have more complain to life, work,I know it is not good like that, I have no way to get rid of the unhappy trouble.

I think I have to adjust my atittude to life and work,I attempt to find a new job, I have so much job-interview, but none successed,at last, I have to think why I can not catch the chance,why I lose,Finally, my HR manager told me that you have enough abilities and experiences to suit the job,you are so confident,but your behavīor is not adult so that they do not trust,and hesitate.so...I do not have words.