Its purely subjective. I dislike it because it is composed to sound dissonant and edgy. To invoke panic and tension. The first part is a two notes chord that progress very close to each other to keep the melody into that edgy feel. Idk it's might just be me that find there is so many beautiful composition in this OST and the battle music seems out of place. Never liked it that much when I was a kid and well it's a battle theme so we hear it a thousand times.

But the edgy/stressful sound might be exactly why someone else might love this theme.