I'm sorry to hear you're feeling so down about this, hale_bopp. I can relate to both sides of this, as I've certainly had some success, yet there are others who are much more successful, and still others who haven't had any success at all. I learned that worrying about how much success others have (or don't have) isn't going to do any good, as it is a sure-fire way to quickly drain positive and creative energy, which leads to depression before very long. All that any of us can do is keep doing the best we can, and take things one day at a time. That's the best advice I can give you for now... hope it helps. 
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You can't tell which way the train went by looking at the tracks.