Synonyms of mismanager

1 Syllable
dolt, klutz, clod, fool
2 Syllables
blockhead, spoiler, muddler, butcher, numskull, fumbler, foul-up, bumblers, dunce, duffer, idiot, muddlers, muffer, donkey, duffers, bunglers, botcher, bumbler, bungler, fumblers, goofball
3 Syllables
bonehead, mishandle, harebrain, blunderer, addlebrain, featherbrain
4 Syllables
butterfingers, ignoramus, incompetent