But there's a difference between "Oh, just add some shading, keep trying though, you'll get it eventually!" and "THIS IS HORRIBLE, IT WILL NEVER BE RELEASED EVER. EEEVEEEER.".
I'm sorry, but who ever said something like this? I just said that it's hard for sprites like these get released. They just need some work. Also, this is the Internet. Not everyone in the world thinks exactly like you. Some people will be like "Oh you'll get it" and others are "AAAH THIS IS HORRIBLE 0/10"
And I think most of us are not in that second option, probably between those two.
And, as you said, I'm going to stop posting too. Xkower, don't quit your projects, no matter what anyone says. If you trust that you can improve at spriting, then you will. Just work a bit more each time, and eventually you'll be a great spriter!