I now read your journal post. Those things suck when that happens, it happened to me in similar ways too. Teachers and certain students can be so ignorant and mean.
I guess all I can say is, if you truly like or would like to make nice artwork, (that is if you're interested), then don't give up and don't let the anger take you over.
Practice art in your own peaceful time when you are sound of mind.
Even if you don't think your art looks good; you will get better.
And remember to eat.