Definitely not the fructose, as that's the majority of the sugars in apple juice to start with. I'd bet on excessive bittering for the most of the weirdness. Your best bet is to kill the yeast and backsweeten with some apple juice concentrate.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk