I have a cube shape with a hexagon hole in the middle (Bevel modifier added). I have added loop cuts around it, made straight lines on the face of the cube to get better topology. I then selected the vertices on one side just for the example using Shift Ctrl + B, subdivided it, then with loop tool made a circle. But the holes are not as smooth, and also There's Ngons. The holes still look a bit edge, not perfectly ellipse shaped. Is there a better method to achieve this?
PS: I'm avoiding the subsurface modifier for this mesh,