Disillusioned

From Dictionary.com:

dis·il·lu·sion   /ˌdɪsɪˈluʒən/ Show Spelled[dis-i-loo-zhuhn] Show IPA
–verb (used with object)
1.to free from or deprive of illusion, belief, idealism, etc.; disenchant.
–noun
2.a freeing or a being freed from illusion or conviction; disenchantment.