How can I make this weaved pattern more realistic? First I apologize for making a kind of similar question to the one asked 6 hours ago. I still feel the need to ask another question because I've successfully modeled the weaved pattern and now I would like to ask about the node setups in Blender to make it more bamboo like.

After apply some color to it, the pattern looks like this:



Needless to say, it looks completely fake, although I tweaked some settings in the Principled BSDF node. I have three questions: 

1- Why does my texture look very fake? I can clearly see it looks fake, but can't explain why.

2- Can we use some node setups only in Blender to achieve the bamboo texture? Or must we use some bamboo texture image? 

3- If we can use node setups only, what is it? I'm experimenting with noise texture to add roughness on the surface, but achieve no significant result.

I would like to achieve this texture:



My blend file: Chair.blend. The pattern is on layer 2.
First of all you should work on the texture. You can do it procedurally (for example mixing some Wave node textures) but the easiest way to do it is to use a repeatable wood image texture. Then you can duplicate this material and vary the color with a Color > Hue/Saturation node. Don't forget to put a bit of glossiness at the end.