I understand the desire to dismiss this book and this author–but he’s too good a novelist for it. Theo Tait has a great take on him in the London Review of Books here, which also has some juicy biography bits:
http://www.lrb.co.uk/v28/n03/tait01_.html
He isn’t always as honest as he purports himself to be, is probably the worst thing you can say about him. His vileness is just there, condemnable, what else to say about it other than maybe it’s simultaneously repulsive and titillating. But the weight, development, momentum he can put into a book is very impressive.