nonintuitive

/ˌnɑnɪnˈtuɪtɪv/
adjective
  1. Not easy to understand or figure out without careful thought; not obvious or instinctive.
    • It feels nonintuitive to turn left here, but the GPS says it's the correct route.
    • The new software's layout is nonintuitive, so many users need a tutorial.
    • Her explanation of the math problem was nonintuitive, but it made sense after I studied it.