Upper anatomy looks solid for the most part. Arms, chest, and abs all look anatomically similar to normal humans, taking into account style. Shoulder/neck area is a bit confusing, but they work.
Legs, on the otherhand, are looking pretty meh. You said before your understanding of lower body anatomy is weak. Man up and learn it. I see things exaggerated that shouldn't and vice-versa. Of course, it's largely a matter of personal style but I can make an edit to show what I think would correlate better to the established muscle pattern of the upper body.