I feel Ripon Nath is not convincing

For me, Ripon Nath in The Dark Side of Dhaka (2021) is around 1.5/10. Some emotion is too simple and I cannot believe the character enough. The role need more detail, but the performance stay on the surface. Many moments pass very fast and I do not remember much after it. I do not hate it, but it did not pull me into the story. Maybe other people will like it more, but this is my feeling.