[n] someone who is not competent to take effective action
[adj] not meeting requirements; "unequal to the demands put upon him"
[adj] not qualified or suited for a purpose; "an incompetent secret service"; "the filming was hopeless incompetent"
[adj] not doing a good job; "incompetent at chess"
[adj] showing lack of skill or aptitude; "a bungling workman"; "did a clumsy job"; "his fumbling attempt to put up a shelf"