Complex sentence: Audrey finds Shumway stuck at the curb and puts him in the police car, explaining that his Trouble causes him to reset the whole day each time he blames himself over what goes wrong and returns to the beginning to get it right.
Split into simpler sentences: Audrey finds Shumway stuck at the curb and puts him in the police car, explaining that he is causing the day to repeat through his obsessive repeating of what goes wrong. His Trouble causes him to reset the day each time he blames himself and goes back to the beginning to get it right.