Surprising to me. I feel like Nabokov does a lot of work to specifically not play up the sexuality of the situation, nor does it glorify anything – other than, maybe, Lolita but solely from Humbert's perspective. I've met a lot of people who disliked the book, but no one who was ever riled by the premise of the plot. Which is part of what makes the work so brilliant. Anyway, if you disliked Lolita based on that ground, I think Pale Fire's morally questionable material differs enough categorically it shouldn't bother you. Worth reading, I think.