You're competing with people running i7 desktops, servers, botnets, clouds, etc. You're doing nothing wrong, thats the payout your dual core laptop is going to get you.
edit: If I could make a suggestion for you, it would be to go to a lower difficulty CPU coin and mine that + hold it and see if it gains value, you wont make any money mining a popular coin with a laptop.
Also, I would get coretemp and make sure you're not running your CPU cores at 100C if you want to keep your laptop.