Thought Provocation (Mr. Disillusionment)

disillusionment
noun
us/ˌdɪs.ɪˈluː.ʒən.mənt/ 
uk/ˌdɪs.ɪˈluː.ʒən.mənt/
a feeling of being disappointed and unhappy because of discovering the truth about something or someone that you liked or respected