Here are some recommendations on what you can do if you are unhappy in your current internship:
Speak with your supervisor to discuss any difficulties you are having. Perhaps your supervisor can provide insight and offer you suggestions or he/she may even suggest putting you on a different assignment.
Before you make a move, take a step back and try to look at the situation objectively and try asking yourself these questions:
"Why am I so dissatisfied with this internship?