make disappointed or disillusioned
disenchant - disappoint
To ‘disenchant’ somebody is to make them feel that something or somebody is no longer good or what they thought they were. It implies a strong feeling of having been let down or deceived in some way, which can elicit a strongly negative reaction.
The overly aggressive and antagonistic behaviour of that protest group could well disenchant the public and turn them against their cause.
Adam wasn’t shy about expressing his growing disenchantment with how things are being run at the company. I’m glad somebody had the courage to stand up and say it.
The Prime Minister came to power on a wave of popular support, but recent events and her administration’s handling of them has seen the public grow increasingly disenchanted.