6. Kevin Durant
Durant became one of the Thunders’ heroes after leading them to the NBA Finals. They hoped that he’d lead them to glory the following season against the Warriors. But then he crushed everybody’s dreams when he joined their conquerors (via The Ringer).

This was a bitter pill for fans to swallow because he joined the team that beat them. In the end, Durant won a pair of rings so he made the right decision for his career. But he also became one of the most hated players in basketball.