Fernweh.

FINALLY SOMEONE SAID IT!!

Even if most people are just joking, it bothers me when other people actually think it's all due to a failed relationship when the problem is actually bigger than that. Vi getting to this point isn't because she broke up with Caitlyn. She has bigger, more difficult things going on than just a failed relationship. Adding to that the most painful factor for Vi is when she fights Jinx, which is one of the factors that really affects her. She went from being protective of her sister to "hurting" her sister. (Even though her sister Jinx brought this on herself, but anyway)

"Losing Caitlyn was the last straw, as they say"

Caitlyn was the one who got Vi out of prison, She got her out of the worst place Vi had ever been in. And Caitlyn was the last person Vi could trust and now she's gone.

I mean you can see she wasn't that miserable when she was in prison because she said herself, "The only thing that kept me going, was the thought of getting back to you." Now her sister is gone and Caitlyn is gone, the only two people left in her life. It's only natural that she would come to this point after literally losing everything.