Most of the parts here just look like extruded 2D shapes, I'd try rounding them out a bit. Also the wood grain texture being consistent between the desk and the drawer should never happen except if they were both punched out of a single flat sheet.
Roughness is uniform (very shiny) and the model edges are very sharp. Usually in woodworking they taper (chamfer) or round out edges in order to proactively limit edge wear. Also, the wood flow does not follow the length of a piece in some of your models, like the chair.
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