Telling someone what's wrong with what they've done is what criticism is. It's not personal. If we told you what to do instead, then it wouldn't be your own art anymore. I usually give a couple ideas of paths to go down, but I never say "Put this here, get rid of this, and make this red." Even if it's what I would do, it's not necessarily what you should do.
We're not slamming you, we just see lots of areas where you could make things a bit better.