Complex sentence: Sarah Byrnes and Eric Calhoune both have physical issues that cause people to see them differently, but they also see themselves negatively; by the end of the text, this view is proved to be erroneous.
Split into simpler sentences: Sarah Byrnes and Eric Calhoune both have physical issues that cause people to see them differently. But they also see themselves negatively, and by the end of the text, this view is proved to be erroneous.