Hey, now I don't think it is fair to blame the lack of comments.
If you really want to improve "doing humans" your solution isn't here. Instead start learning some human anatomy. Get some anatomy books, go to model sketching sessions etc and then apply what you have learned on your canvas.
While comments like "The arm is too long, fix it like this" "That elbow is off angle, change it like blah blah" etc might aid you with a single piece, in the long run having all the knowledge down will help you greatly.
And if you aren't inspired, don't push it (unless you need to, for work or something). Break the routine and try something new, or something.
If you can't translate what you see in your head into pixels, keep trying. Don't just scrap it.
Pixel art shouldn't be taken as something where you see good results straight away. If something doesn't look like what you want, then keep editing, and editing, and playing with pixels here and there.
Imagine it as a puzzle where the more you mess around with it, the further you can push, and the better it will look.
