unsimplicity

From un- +‎ simplicity.

unsimplicity (uncountable)

1. Absence of simplicity; complication or complexity.
   • 1855, Charles Kingsley, “The Two Ways of Being Crost in Love”, in Westward Ho!: Or, The Voyages and Adventures of Sir Amyas Leigh, Knight, […], volume I, Cambridge, Cambridgeshire: Macmillan & Co., →OCLC, page 113:

     [Eustace] then went home flattering himself that he had taken in parson, clerk, and people; not knowing in his simple unsimplicity, and cunning foolishness, that each good wife in the parish was saying to the other, "He turned Protestant? The devil turned monk! He's only after Mistress Salterne, the young hypocrite."

• “unsimplicity”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.