Modeling subdivision surfaces require a lot of practice and some surfaces can be quite a challenge, in your case adding edge loops all around will cause other edges to appear hard, study subdivision wireframe models so you can learn from it , there's a lot of discussions on that on polycount.com
Look at these two examples And you'll know what to do next, study it closely , also you are leaving bad topology in your model, should be mostly quads, you also have many edge loops you can delete.
