anticlimactic
adjective/ˌæntiklaɪˈmæktɪk/
/ˌæntiklaɪˈmæktɪk/, /ˌæntaɪklaɪˈmæktɪk/
- used to describe a situation that is disappointing because it happens at the end of something that was much more exciting, or because it is not as exciting as you expected
- Unfortunately, I found the ending of the film somewhat anticlimactic and not what I had hoped.
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anticlimactic