A world where Kris doesn't exist would be a better one
Dess is gone and it's most certainly Kris' fault, it's Kris' fault that Noelle is traumatized, their parents are divorced and the potential end of the world might happen. The hand symbolizes Kris is aware they deserved to suffer Dess' fate instead.
Kris double fucked up with Noelle with all the autistic pranking as so she is unsure whether Kris was even being nice or mean to her. In fact, Kris is a bad person who enjoys hurting things and scaring people
Susie only became friends with Kris because of You. It doesn't matter they are silly together because they'd never get close with Kris' lack of initiative. You are improving Susie's life, not Kris.
Even Toriel is having fun with another man much to Kris' dislike
The last nail in the coffin will be seeing Asriel come back and showing he's fully into college life and drifting away from the weird sibling and his trashy broken family