Do you have any reference images you're working from? The legs seems short, but this depends on the chair style. A shaded wireframe would help people to critique your modeling. For example.
Not too many, instead you have poor edge locations and poor edge orientation. The orientation of the wireframe edges is commonly called the "flow" or the "topology". Having a good flow means your edges would be following the curvature and silhouette of your reference object. For example, this model has poor flow, the edges…
It's a good start! Proportions do need some work. Notice how the middle height of the chair in the photo is right about at the top of the cushion. Compare to your model. The cushion itself needs to look soft and rounded, as in the photos. The wireframe shows that you are merely continuing your loops straight through the…