Each day on twitter there is one main character. The goal is to never be it

— maple cocaine (@maplecocaine) January 3, 2019

We are hearing the echo of Sir Walter and Elizabeth's opinions/words. This is a strange introduction for the main character, she is ignored and secondary. Chapter 1 focuses on Sir Walter and then the family context, Chapters 2 and 3 are a group setting (and people finally speak). A first time reader may not identify Anne as the main character till chapter 4 when the text pivots to focus on her. In chapter 1 we hear of Elizabeth's disappointment with Mr Elliot but the history with Wentworth is hidden till Anne is alone. Modern texts tend to have more active, vibrant main characters (like Lizzy Bennet) who have agency and push the story forward through their choices and actions. Fanny Price in Mansfield Park is another good example of the sort of main character modern readers struggle with.