disillusioned
US /ˌdɪs.ɪˈluː.ʒənd/
UK /ˌdɪs.ɪˈluː.ʒənd/

1.
desilusionado, desencantado
disappointed in someone or something that one discovers to be less good than one had believed
:
•
She became disillusioned with politics after the scandal.
Se sintió desilusionada con la política después del escándalo.
•
Many young people feel disillusioned with the current economic system.
Muchos jóvenes se sienten desilusionados con el sistema económico actual.