Every little detail? lol
I didn't even mention the Midgar-Zolom he killed, or the barrier he created around the Crater, or the way he tortured the characters with telekinesis before the final battle...

You are just pissed because you said(in more than a single post) that he accomplished nothing, and I proved you wrong.
Well, deal with it.

And BTW Kuja didn't plant the Iifa Tree. Garland did it.
Compared to Kuja's accomplishments...trust me, Sephiroth accomplished nothing. Maybe Sephiroth should go destroy a planet or something. Then he can compete.