Understanding Artistic Frustration

Maria had always been fascinated by the art of painting, especially the ways different colors could evoke various emotions. However, despite her interest, she was often left feeling ____ when it came to her own attempts at creating artwork. She wanted to express her thoughts through vivid images, but her efforts frequently resulted in disappointment.

The words that best complete this sentence should convey a sense of feeling overwhelmed or inadequate in her artistic pursuits.