Somebody who seemed like they used to be there for him, helping him, now isn't. She yells at him, tells him he isn't good enough, etc. All of the pain that he's been in, well, it's her fault. And nothing has changed from this image, and nothing will.
My favorite part is "though we stumble, we don't have to fall," because it embodies the truth in how we all make mistakes, but we don't have to go down because of them. This person that the song is about needs to recognize this.