Is motivation a thing you can just pressure yourself to summon? If you do anything enough you're bound to get better at it, I think most would agree, but a school provides a context in which one can focus what in real life is a limited amount of energy into a single doctorine, for a while. I bailed through my art school because I was displeased with the program, but the two years I spent there certainly let me focus my life in learning to draw, even if I did it on my own in the end.
So 'GET WILLPOWER, DUDE' isn't perhaps the most helpful of advice. And visiting a website that teaches drawing with a method is. Who knows.
I'm touched by fortunato's posts, but I feel in the end Pixelation isn't here to help anyone not sink to the bottom, it's here to help people who are proficient at swimming, learn to do breaststroke or some other technique, if you catch my drift.
If someone's going to give up drawing because of harsh critique, they probably are better off without it, just a thought.