How is a man who is so much messy, unorganized and lazy in real life end up getting very high grades in math?

and i being so organized, neat, hard working and efficient in real life can barely manage to pass math without intense struggle? he is disgustingly messy and lethargic. He keep getting fired from hourly jobs, but he ends up with straight A's in calculus and beats the heck out of me in math and i barely get D grade in calculus. this is not fair and its injustice.