I went to Letterboxd to read reviews and there are some great ones there:

Probably the most harshly transformative movie I've ever seen, and profoundly cyclical in a way that most movies can only hope to imitate. It's the children's story you never, ever want your child to see because the depictions of trauma and nature are dangerous to undeveloped psyches. It's the story we weren't told and the retcon of all the others. But you can see it now, it's okay. It is sad, but it is dense with value.

https://letterboxd.com/xebeche/film/ringing-bell/