You are just stupid signing that, you give a promise, you have to keep it. If you sign a contract saying will work for a person for RM1 per year, that's your problem, unless you have proof that he is pointing a gun on your head, else no matter what reason you give, you are important, you are too good, salary is too low, boss sucks, government unfair, traffic is bad, moon is round, gravity is 2x, doesnt change the fact that you are trying to look for excuse for mistake that you have made.