I'm sorry. I don't mean to be a kvetch.
a damp squib
A: This hotel room sucks.
B: Oh, stop complaining. We only have to stay here for one night.
A: But the carpet smells like a wet dog and the bed is as hard as a rock.
B: Why do you always have to kvetch? Let's just enjoy our vacation.
A: Maybe I should complain to the manager.
B: Please, just stop whining. Let's go down to the pool for a swim.
A: I'm sure the poor will turn out to be a damp squib as well.
B: Look, Phil. This hotel is not what I expected either, but there's nothing we can do about it.
A: Oh, okay, then. Finish your coffee and we'll go for a swim.
B: I don't want to finish my coffee.
A: Why not?
B: It sucks.