My company placed me to the Client as Experienced

I am a BE graduate after college I tried govt exams but couldn't clear it...after that i learned a software on my own i joined a small company which trained me little nd projected me as a experienced to a client, i cleared interview and got placed to the client but that project is too complex and even fr small tasks i am taking weeks to complete....daily i feel bad nd humiliated fr not completing tasks and people are not friendly here... Should I see this as an opportunity or this is wrong...will other IT companies to do the same