I tend to disagree with your opinion here. There is a level of objectivity within the realm of taste. I will continue to warn people not to eat pea gravel even if it has a great mouthfeel, for instance.
The plot is less complex than it appears at face value, because at face value most people are lacking the dialogue that despite Nolan’s protestations has a lot of valuable information within it. Is it great art because he makes you suffer for it? Is The Prestige worse because it’s enjoyable to rewatch?