Your anatomy needs serious work. It needs to at least be buyable, which it is not. The waist is way to small and the chest way too large. Lots of things are incorrect and don't even exist in anatomy at all.
Worst areas are the stomach and belly button. All those lines are entirely wrong. The arms are way too skinny (mostly cuz of the chest size, and I mean the frame BTW). Face looks like you force it to make it look buyable, but it's not working.
Overall, maybe you should look at real world anatomy, before you go and stylize. Because you are way off, and it's not going to get any better until you learn. You don't have to follow any exact formula, but it does help to at least make things look buyable, rather than forced or guessed.