After surfing around in Deviantart, I'm impressed that many Deviant users worked so hard on their artwork, in contrast to other users the ones who stole their artworks from hard worked people by clicked on "save as" to PC. Yes, I understand how your malicious feeling toward them, they'd possibly don't or can't lift the pencil to draw in their ideal picture in the head.
One journal got me step forward to do something on my own. His explanation is very understandable what he explained how WE should improve in ourselves rather than steal someone's work, claim own work and get lawsuit from the real owner or company. Seem Endling wrote the long paraphrases on every journals, unlike me, Im just a artist, not a writer. Yet, he attracted many users and got over 12 million page views and I only got over 4 thousand page views and got comments of "thank you for favorite" (that isn't something I should proud of, but oka). Better not to compare you and myself to great talent artists like Endling or else, the depression and doubt can pull you down into the bottom of the sea.endling.deviantart.com/journal…
For instance, imagine yourself as driver, you can normally held your breathe and swan under the water for while, that's the aspiration. Still, when you got in impatient or unwanted doubt then giving up, because of that then you're letting yourself sinking down to bottom of the sea. its not something you would say "I can do it", sketch a little on the empty sheet and done with it, that's not something you should describe yourself passionate. Try sketch more than four pieces of paper and see yourself. Doesn't matter what style you are draw, its about what you love to despite of your style like Kid Teen Titan, anime, Johnny Bravo or whatever. Just do what you love and have fun.
I gotta give you a little piece of my personal, aye. At 12, I was in depression and doubt like you, worrying over something I shouldn't have as become professional artists like Jamie Tyndall, Brian Haberlin and Stan Lee. I has drawn the hundred papers for 12 years ago and my room filled with old drawn pictures, of course, I still have them in the boxes, in the closet (I don't want to open the closet or they will run over me. Haha). Altogether, the point is draw something that you enjoy. Period!
P.s: sorry for my English. I just wanted to write the journal in here because I feel like it. By the way, check out his page and bet you gotta love his works. I'm also his fan of his work.