Personally I'm more inclined towards the view of Nabokov's novel that it's a masterly literary experiment - an exercise in how far we are prepared to believe a narrator? The narrator Nabokov is reading us the words of the narrator Humbert. But the first thing Humbert tells is that "everything I have ever said is a lie". And then we are supposed to believe his outrageous stories? Perhaps it's all an exercise in self-delusion and malicious, vicarious grotesque fantasy?
And I speak here as someone who has read the novel "in the original" :)
I have to admit to being left on the sidelines by TRISTAN & ISOLDE ;)
