Just say that you got a new great opportunity, give two week notice and offer to help train somebody as much as possible to take over your responsibilities. Wh

Just say that you got a new great opportunity, give two week notice and offer to help train somebody as much as possible to take over your responsibilities. What else is there really? I wouldn't mention the fact that they exploited you. It wouldn't gain you anything, and would just create a risk of burning bridges.