As a person, Leda is unforgivable. As a character, I didn't approve of her decisions and yet there was till empathy there. Maybe that also makes me an incredibly selfish person.
Nothing has ever portrayed the state of a character's emotions more viscerally than Olivia Coleman numbly kicking her luggage down a flight of stairs.
Subtle. When young Leda presumes the hiker's kids are girls, because she is already considering leaving.