It depends which feeling you seek. I first read American Psycho and many years later Lolita. I had similar vibes: unreliable narrator, a man who thinks he stands above all, justifies his actions etc but is one 100% awful an all levels. Long passages of “nothingness” numbing you and you might just slip over the real horrors, cause they are hidden between the lines before they become real actions. If I had to choose one, I would pick Lolita in terms of: which book made you feel worse. I like both books a lot, not that I seek to read them again anytime soon, but I also “enjoy” the strong emotions they cause. I love to hate the person they describe. I am open to any suggestions too.