Mori has Jeabongchim, a technique that multiplies all of his stats, which in this key I believe he can use up to 8x...? I forgot the max amount he used in this key. I don't really know how stats work on this site, but that should probably amount to something. Keep in mind that you can combine this with Mori's own Reactive Evolution & Accelerated Development.
I'd personally think Mori outskills Garou, but we'll get stuck in a 5-page debate on which one is more skilled and I'm too lazy for that, lol.
And as Ovens has mentioned, I forgot the Incomplete form doesn't know how to use the Gourd, so it's off-limits in this key...
Well, there's also Yeoui's sheer weight. Is Garou able to resist being thoroughly crushed just by having Yeoui dropped on him? (For reference, a character who could lift planet Mars had her arms snapped right off when she tried to lift Yeoui.)
And yeah, if Garou can't resist fear hax it's highly likely he'll surrender at the start of the match under its effects.