I feel Marsh Chamberlain is not convincing

For me, Marsh Chamberlain's work in I'm "George Lucas": A Connor Ratliff Story (2024) is easy to talk about after watching. For me, it does not feel very real in many scenes. The role needs more detail, but the performance stays on the surface. I do not hate it, but it did not pull me into the story. Many moments pass very fast, and I do not remember much after them. Some emotions are too simple, and I cannot believe the character enough. Maybe other people will like it more, but this is my feeling.