Usage patterns
〈人〉が不調に陥るfor someone to fall into a slump or poor condition
He's been in a slump lately.
〈事〉が不調に終わるfor negotiations or an attempt to end in failure
The negotiations ended in failure.
〈物〉が不調を起こすfor a machine to develop a malfunction
The engine started acting up.
不調から立て直すto recover from a slump
She pulled out of her slump and won the championship.