If I had to guess maybe it's the chandelier. They go that low in real life, but that's usually reserved for dining table areas and whatnot.

Looks really nice, but the sofa seems kinda oddly shaped. Feel like it might look better if you kept the curve while making the back a bit higher.

It looks amazing, great render. Only problem is the room height and the chandelier looks pixelized in some parts.

chandelier ref. looks like a cheap 70's fixture...