There's a quote from Steven Bond, some guy whose web site I read a while ago, regarding why he critiques awful movies:
"Why do I review crap? Simple: for pleasure. For the sheer joy of it. Every piece of crap you like is an immense world of delight waiting to be explored. Crap is a driving force, crap is inspirational: nothing urges me to set things right more than seeing them done wrong. I'm especially pleased when the crap is so bad it makes me angry — for anger is a pleasant sensation. To feel your bile rise and your blood boil, to feel a rush of fury — why, it's the pleasure of being alive, of feeling some actual emotion instead of the constant dull fuzz of the easily contented."
Partly it's that. Anger towards the system very often gives you the energy, motivation, and experience enough to make something great. The two big projects I've done - the book I wrote last year, and the site I'm building the beta of now - both had some element of hate against the system that was preventing me from doing something. It's not good to dwell in the emotion, but using it is useful.
