Christoph J. Hiller did not work for me

Christoph J. Hiller as Actor has some moments that stayed in my mind. For me, it does not feel very real in many scenes. The role needs more detail, but the performance stays on the surface. Some emotions are too simple, and I cannot believe the character enough. Many moments pass very fast, and I do not remember much after them. This is only my personal view, but the performance changed how I enjoyed the film.