The Sinner

The major flaw in season 3 is that there's no compelling reason for Jamie to feel any of his existential angst other than his own solipsism. It's not a convincing argument, emphasized by the fact that most of the characters don't behave the way people normally would when faced with these situations; which is also unexplained. Everyone is both drawn to and repulsed by Jamie, but he's really not worthy of either emotion.