user-unfriendly

us·er-un·friend·ly

(yo͞o′zər-ŭn-frĕnd′lē)adj. us·er-un·friend·li·er, us·er-un·friend·li·est Not easy to use or learn to use: "renovating user-unfriendly JFK airport and rebuilding Brooklyn shipping" (Stanley Brezenoff).
us′er-un·friend′li·ness n.