I think its kind of a matter of interpretation? The “why” is that he either refused to bow before men (who he thought of as beneath himself), or, the less fun option, he just didn’t follow daddy’s wishes and got sent to the corner.

As for his “award”, that too is kind of…opaque. One way to interpret hell is as the absence of creation, as in literally outside of Yhwy’s world of creation. So either a new second world for unworthy creations to go when they end, or just literally a void of nothing, because to be removed from God’s world should be to be removed from reality.

Ideas about hell being a place where the unrighteous are tortured largely come from later, non-canonical stories, with the biggest name easily being Dante’s Inferno (which itself seemed to be largely about the author taking jabs at people from his own era that he didn’t like or agree with iirc).

I’m not a scholar on the subject tho, so take it with a grain. This is just what I’ve heard, and I’m quite sure that I’ve heard some incorrect and half-true things before.