According to Osho, your disillusionment arises because his words shatter the mind-made image built from ideals and future fantasies. What breaks is the false self, not you. This shock is healthy: without ideals there is no comparison, condemnation, or ego. Let the image fall, stop asking 'how to be,' and relax into simple presence, being itself.
Feeling disillusioned means your pretend mask is cracking so your real self can breathe.