But its not in fact “OK”.
Humbert, the character, has deluded himself, and continues in his delusion. We can see and appreciate the truth behind the delusion. Its sort of like watching a spectacular crash caused by stupid driving.
Lolita herself is human, flawed, complex and deluded. She also crashes. It does not excuse Humbert.
Nabokov was a superb observer of humanity, besides being a master of language. I compare his ability to get into the complexities of a character to Tom Wolfe, matching Wolfe’s rich structures of irony and layers of hypocrisy. I find Nabokov less cruel than Wolfe though, and superior in his English prose.
Lolita’s life was absolutely ruined by adults who abused her in horrible ways. She is punished ( as you have described it) because others misused her.
I am not arguing whether this book should be ‘available’ for reading. I do not like Nabokov’s writing style ( it is terribly Russian) and it is ( as I have already said) not my cup of tea. I have explained why I don’t like it and all you want to do is convince me that you are correct. Don’t bother I don’t like the book. I don’t like the story.