Am i good enough?

Having received mid semester marks, it just made me depressed. One subject i just pass and another i received 66 over 100. The average was 72. Now it really made me think, where did i go wrong? Ive studied constantly and understood theory but still there isnt any results. I told myself study harder. It is second year and second sem subjects. Nothing comes easy. Now, i dont even know how to study. What made me feel worse than I already did was having friends who went for the big 4 company interview for summer internship, macquire bank as finance internship, Cimb bank which is all leading banks for finance industry in Australia. I feet inferior to them and seriously wondering where did I go wrong? It just kills me as all my friends were all nervous regarding the interview etc, and Im just worrying regarding where am i going to spent my holidays and how to finish my assignments. It really made me think, am I not good enough? My results are obviously extremely inferior compare them but over the long semester, ive seem to be better. Is like I always explain to them during classes and stuff like that, but at the end of the day, I didnt get the marks. I just feel plain dumb. Maybe I am not good enough for Australia here? Now,working here on a permanent basis can just be a dream. I'm not good. Just face it. Why do they wanna hire me when they could have a well-rounded person like them. I really felt inferior first time in my life and what worse was I was suppose to be like them. I was suppose to be in the same league as them. I really really regret all the time wasting i spent when i was in first years. Bah,you idiot. Now, working hard as well doenst seem to pay off. Has it been too late? I think so. But, now just aim to be the best that i can. At the end of the day, I know that I have advantage in Malaysia and Im good enough, but im just a big fish in a small pond. Come to Australia, im just a small fish in a ocean where there are sharks and what not. Ive became the food for the upper food chain.