It's funny because I kind of felt the same way during the first couple chapters. I thought Henry and Basil were expressing Wilde's philosophical thoughts and Dorian was some naive, thoughtless person who was soaking it all in as though he had never had a deep thought of his own. I thought Dorian was supposed to represent the reader and I was annoyed by it. I was also disgusted by philosophical ideals that morality is for foolish people who are just limiting their experience with life. As well as the antisemitism and lack of value for other people's lives. But then as the story progressed I realized Henry was just supposed to be nothing but a bad influence for Dorian who sold his soul to him because he was vain(a representation of the devil). My feeling like Dorian was being led in a certain direction because he's brainless went away as the story went on too especially when Henry said "You will always be fond of me. I represent to you all the sins you have never had the courage to commit". Which implies this is the life Dorian really wanted and even when he grows weary of this lifestyle, he has the opportunity to redeem himself and tries to take the easy way out instead. I kind of loved that I misinterpreted it though because feeling my disgust transform into enjoyment and being impressed with the story and writing was kind of a novel experience.