The casual reading of Mahabharat conveys that Shakuni was wicked and supporter of his nephew Duryodhana who was a Kaurav. Actually, in the shield of support, Shakuni was using Duryodhana & Kaurav brothers to destroy the entire Kuru kingdom. It was never so easy to destroy the entire Kuru kingdom but Shakuni made it possible also succeed. Well, what made him do so do not characterize him as wicked. What actually worked behind his triumph is what worth knowing and learning.