What is wrong with the settings or the mesh? It doesn't subdivide properly I created a 2D plane and formed a person. Then I added a solidify modifier to give it volume and then applied a subdivision surface modifier. I tried applying them both but it didn't make a difference. I would be very greatful for help. Thank you already for your time!
Set the Crease of the solidify modifier;



Gives you;



And a lesser value;



Gives you;



To get a more smoothly rounded edge, remember to increase the subdivisions;