>>2122838 I see too many sharp nodes being used... and don't come and say "that's how the original art is"... I find sharp corners on clothes and skin to be highly unrealistic... fabric will never form such sharp creases naturally, nor will skin. Making the lines flow a bit more naturally will help a lot IMO.
I circled most (not all) of the sharp corners in red.
In green there is a spot where a line on the leg is WAY too thin, a line from the jacket is not reaching the line from the leg and the colors from the jacket are peeking over the skin.