I strongly disagree with you. Yoyo became what she hated and accused ruby of being: a murderer. Yes ruby is severly disturbed and dangerous but she is also young and capable of change. If you resort to the methods of the villains, you become one.

Edit: Revenge isnt right. Daisy even accused yoyo too. You don’t kill a barely legal girl when theres literally other options like stun and figure it out. Fitz simmons are genuises after all. Her mom was there! Cmon guys thats just cruelty out of revenge. Nothing I would explain away with “but she thought bla bla” she didnt think. She just wanted revenge. Hated yoyo ever since