Needs much more geometry, not only support loops, to have a good final sub-d result. Also, add thickness to see a better result as well, since it's just a plane, and doesn't have any volume to sub-d off of.
@mantaskava Is this a wall sink? Some trades have very specific names for curves (so it can vary depending on who you're talking to) but the concave area where the wall and the sink meet is generally called a fillet. The convex areas on each side in the front of the sink are generally called rounded (radiused) corners or…