Breffni O'Rourke has contributed a lovely specimen to our growing collection of cases where combinations of negations and scalar predicates leave writers and readers in a state of confusion. This one is from the EB section on the 14th and 15th centuries in Ireland (full path "Ireland:History:First centuries of English rule (1166-1600):The 14th and 15th centuries"):
Although both the Gaels and the Anglo-Irish had supported the Yorkist side in the Wars of the Roses, the Yorkist king Edward IV found them no less easy to subjugate than had his Lancastrian predecessors. Succeeding in 1468 in bringing about the attainder and execution for treason of Thomas, earl of Desmond, Edward was nevertheless obliged to yield to aristocratic power in Ireland. The earls of Kildare, who thereafter bore the title of lords deputy (for the English princes who were lords lieutenant), were in effect the actual rulers of Ireland until well into the 16th century.
If this confuses you, try substituting "more easy" or "easier" for "less easy".