I know the feeling...... I STILL KNOW THE FEELING LOOKING AT YOUR DANGIT!!! Why oh why do I torture myself?! .... Right I remember that if I stare at it long hopefully I would have an epiphany. Dangit.
Ya you see, that negativity behind you is what drives you to get better. believe me, That negativity will be your best push factor to get better. Someone else's art work is better than yours, take that as a challenge and rub in his face that you achieved what he said you couldn't! It can be stressful but its what keeps you going and working hard all these years. Take your biggest weaknesses and strengthen them. Make goals and plan out how you are to achieve them, as he says you will never make it, prove him wrong and be eager to fulfill your dreams. Hey, every story has an antagonist against the protagonist you know?
aaaah the eternal struggle to become "better". You know? I really wonder how these people expect us to live with ourselves. By their logic I think we all would come down to the point where we all would be Genzoman's bitches. bizzare, odd, sad... but funny xD