Not intuitive, not easily graspable by intuition(adjective)
In particular, counterintuitive; counter to what one's intuition expects.(adjective)
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Use "unintuitive" in a sentence
"I've heard this, although it sounds kind of unintuitive to me."
"They'd probably complain about superficial things like the change in mouse acceleration and the "unintuitive" button placement (the Close button is on the opposite side of the window)."
"No, because we know from reading this site in the past, that a player like this, if it came from Sony, Samsung, Microsoft or anyone else would have been seen as a totally stupid product, that was "unintuitive" and "clunky" and not worthy of more than one post."