These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Misaimed Fandom: Vladimir Nabokov hoped his readers were smart enough to see through all of Humbert's attempts at gaining sympathy, and realize what a sick and twisted man he is. Not all of them were.
Some people actually sympathize with Humbert. As quoted by another writer, Lolita is "not the corruption of an innocent child by a cunning adult, but the exploitation of a weak adult by a corrupt child".
Some people denounce the book because they think it's an attempt to portray pedophilia in a positive light (when in reality, Nabokov was trying to show the opposite). Seeing as Humbert is an Unreliable Narrator who often tries to gain the reader's sympathy and justify his actions, it's not too surprising that people misunderstand.