Fuck that granny that gave up on the kid immediately, and was like "Wasting my time". Bitch you wasted your own time, if you're not prepared to see something through, don't start. Newsflash: When a kid's throwing a tantrum, they're rarely gonna be reasonable.
Now, onto the bigger elephant in the room. Asemi-sensei sucks, and so does Akira-sensi. "Hey Chie, I know you've been great watching over Kaya, she's certainly come a long way since you starting looking out for her, and I know Asemi literally had a mental breakdown trying to do that same job, but we're gonna take you off of Kaya duty anyway." Like hello? Is the logic department in? The next words out of her mouth better not be "We're going to have Asemi-sensei watch over Kaya-chan now".