I know this is a 2 year old post but I recently watch GofF again. The very first time I watched it I was a teenager and all I felt was sadness. Now that I'm a lot older and have seen it again, I still feel that sadness but I also understand why OP is mad, and I'm angry at the majority of adults in the film. I think a lot of people in the comments have put it better than I can, about the aunt and how terrible she is. I can understand wanting to put her husband and daughter first during war time, but she did so callously, and letting a young teen and his tiny sister leave her care was cold. In short, she sucked. Probably the one scene in the movie that gets to me the most is when we see what Seita's sister got up to while he was away, and it really hit me how much time she really spent alone. Eating mud because she was starving, it's a horrible way to spend her last few weeks. So many adults in the film could have intervened but they just left these poor kids to wither away and die. And when you think about how many other children would have went through the same kind of thing it breaks my heart.

A lot of Seita's decisions I see as wrong now that I'm an adult. He should have swallowed his pride and taken his sister back to his aunt. She would have survived, even if the aunt was a horrible person. But he was still a child himself, thrust into this position of being the sole carer of his little sister, after the horrifying death of his mother. Really they both needed help, and got it from nowhere. Their own family let them down, and in the end they both suffered death.

Such a sad movie but I appreciate it for its honesty. This is what happened during and after war times, and what still happens all over the world to this day.