Dumped

I've dump my job after working for about 8hours.
I know this make me sound like a wimp but i really couldn't take it.
Tears jus roll down and i feel a ache in my heart.
I know i'm lousy/hopeless/useless etc.
I really not the cut to work as a sales promotor.
I'm failure in earning my own money either for my own usage or to give my parents/grandma.