Mistreatment of the Bad Guy

You hear about super heroes all the time.  Comic book style, or cartoon, or just your Average Joe or Jill turned Hero.  You get a brief history on them and how they turned Hero, then you follow them through their adventures.  What I want to know, is why don't you get the same from Villains?  I mean sure, there might be a couple overlooked full-stories from Villains, but they just don't get the same treatment.
I understand that people like to root for the Good Guy, but doesn't the Bad Guy deserve to tell his story?  Maybe that's the reason he doesn't have a story, he wasn't willing enough to share.  But honestly, how did these people turn evil?  They weren't born that way, surely.  I understand that there are brief histories of these characters, but we only see them from the Good Guy's point of view. 
I'm not a comic book person, or for that matter much of a superhero person.  But I like stories and I like to know how things got to where they are now.  If I were to have read comic books or watched things like The Fantastic Four maybe I wouldn't be writing this blog.  The point of the matter is, Super Villains and the like should be able to tell their story if they so wish and have it recognized as something more than a kid turned bad.
Let's look at the Disney/Pixar movie, The Incredibles.  Now, we don't get the whole story from the super heroes here, but we know more or less how they came to this point.  What we don't know, even though we get the gist of it, is how Syndrome, the super villain, got to own his own island, and how he acquired....everything.  All we know about him, is he was dissed by Mr. Incredible, and set out to destroy super heroes.  Well what I want to know is, what was happening in his life that Mr. Incredible was his only role model?  Or maybe he wasn't Syndrome's only role model, but the most important and prominent one.  How can one brush-off turn into a kid turning into a villain willing and aiming to kill his once hero?

On another note, why are super heroes completely okay and willing to use their powers, typically newly acquired, to fight off evil?  If I had spider webs coming out of my hands, I don't think I'd be rushing out to save burning buildings.

Unanswered questions frustrate me to no end.
L