Ella from The Longest Whale Song

I noticed that a lot of people in this sub reddit don't really like Ella, mostly because she comes off to them as spoiled or irritating. I've read the book a few times but I've never noticed that so I'm curious. What did she do to give so many people that impression?

Maybe it's because my mother also unfortunately doesn't have the best health, but I always empathised with Ella, and it seemed to me that she was acting like any other young child would under those circumstances. I'd really like to know why people dislike her. Thank you!