"My Reputation" is a good example of a certain kind of vintage Hollywood product: it's glossy, yet carries certain real truths. In beautifully modeled black and white, set in a tony upper-class milieu, and with one of Max Steiner's creamiest scores, it examines a young matron's search for autonomy, when her husband dies after a long illness. Set in 1942, it makes numerous references to the war, so possibly this post-war film was meant to allude to the loss that many wives suffered due to the war (or it was one of those films made during the war but not released for several years).
I think Barbara Stanwyck was incapable of giving a bad performance. Whatever the material, she shone and was absolutely "there." Early in the film there is a scene in which she reads a letter that her late husband had written in the knowledge that it would be read after his death, and she is devastating. There's a kind of bookend scene at the film's end when she tries to explain to her children the nature of her love for a man who has come into her life after their father's death, and again she breaks your heart. In much of that scene she is in shadow as she speaks, so that her voice alone carries the emotion.