I think again, I have to quit the job. Is it because of bad luck? Or, is it just my contribution is not enough to them?

I've been working at my work for 3 months now. But, I've been stresed out at work already. Working equals to stress...as many people say, but I don't have to suffer mentally everyday though. But, I do now. I'm in pain, and I guess everyone at the work is strong unlike me. Everyday, I have to call Ukraine, Philippine, and Australia to ask them to send the documents to the company, but they are not willing to do immediately whatever the reason is. And, Kaicho (the big boss) accuses me that I don't do my job with my best. Yesterday, He said to my face "Fuzankeruna (=almost...fu&% you)" At this point, I cried a bit, and thought about leaving from office. But I didn't want to show my immaturity, so I went outside to calm myself down.

Everyone in the office are very strong, but not me. I am a weak person. I cannot take this anymore. Overdose. Enough. Enough.

I want to have happiness, but I guess I won't reach it until I get whatever I like to work with.