goru: Deviantart has a very specific audience, you are either *very good* with 1000's of fans or you draw wolves, yaoi or bad furry stuff and get fans that way. Deviantart will get you as I call 'asspats' they tell you how good you are but you will not get good crits and improve from that community.
jezandu: It's not that your site is bad, its that your art isn't good enough and please take this in a constructive way. There are so many millions of artists out there you need to be exceptional to get noticed. You need to network with artists of a similar skill level or higher and improve with them. Draw every day post and be active in communities like CGhub/artorder/CA and Deviantart etc. If you arent drawing you should be networking and that will get you an audience