@Kikyou I was sad to find that you'd removed almost all your artworks because you're such a talented artist and I really enjoyed looking at your artwork, but it's often said that you can't really evaluate your own work. Quite often when I've finished a GFX I look at it I think "is this really good enough?" then other people say "yes it's great" but I'm not always convinced.
Some years ago I was a member of a photographic forum and became a fairly regular contributor but slowly came to think that my photos weren't really good enough and stopped posting them, so I do understand how you feel.
The edit button thing, there's a time limit on how long a post is available for editing, once the post has past that time limit the edit button disappears.