I will note two things here:
First, she's in a bathtub. That's an odd choice if she's just gonna lay down and die (she could do that anywhere, so why a dirty bathtub?). OTOH it's the locale of choice for folks looking to slit their wrists.
Second, she folded her clothes (neatly no less!). That's extremely odd behavior from Asuka, particularly given her state of mind at the time. But again, it's fairly typical for people looking to check out.
IMO this is, as with other things in the show, something Anno's telling us with subtlety rather than brute force.
For my post-3I fic, go here.The law doesn't protect people. People protect the law. -- Akane Tsunemori, Psycho-PassPeople's deaths are to be mourned. The ability to save people should be celebrated. Life itself should be exalted. -- Volken Macmani, Tatakau Shisho: The Book of BantorraI hate myself. But maybe I can learn to love myself. Maybe it's okay for me to be here! That's right! I'm me, nothing more, nothing less! I'm me. I want to be me! I want to be here! And it's okay for me to be here! -- Shinji Ikari, Neon Genesis EvangelionYes, I know. You thought it would be something about Asuka. You're such idiots.