Complex sentence: Laettner was widely reviled by opposing fans throughout his career, to the extent that more than 20 years after graduating from Duke, he was voted the most hated college basketball player in history in an ESPN online poll.
Split into simpler sentences: Laettner was widely reviled by opposing fans throughout his career. So much so, that more than 20 years after graduating from Duke, he was voted the most hated college basketball player in history in an ESPN online poll.