Never quit doing a task that you love that is not self destructive. If you love art, then keep drawing and/or spiriting. If no one posts about how good your art is, that does not mean that they dislike it. It means one of three things:
1. They see no flaws to comment on.
2. They are uninformed of the effort it takes to make the art. They are then unapprecietive if it.
3. They are too arogaunt and think that they can do a better job, but wom't actually try because they are too laxy and Ignorant of the art.
You should not give up!!