Well you are pretty young (13 to clarify), so it's not suprising that some peopl might view your art as shabby, I myself have no issues with that, and i don't consider myself a level 10. Picasso.
But don't worry about the more you do it, the more you'll start to see some vast improvements.
Look at Oney for an example he started posting his animations around 2006 when he was 16, his quality in iconography starting to increase when he was around 19, between 2009, and now he's a professional artist.
Never give up You'll get better once you keep moving foward!
OFFicalFOREvabandlab
ur not bad its just... that was months ago and now ur better but honestly the art was good