noun (n)

• the quality of being difficult to direct or control by reason of complexity(noun.attribute)

  Example:
  Avoiding the unwieldiness of formal legal processes.
  The onset of unwieldiness and bureaucracy in large organizations.
  

  source: wordnet30
• trouble in carrying or managing caused by bulk or shape(noun.attribute)

  Example:
  The movers cursed the unwieldiness of the big piano.
  

  Synonym:
  awkwardness, cumbersomeness
  

  source: wordnet30