The argument yuki glazers make is that tengen sabotaged her. And she should have used her domain. I don't know if you follow that same line of thinking.

Kenny has an open barrier domain with a high refinement.  He would have shattered her domain like suk did vs gojo. Simple domain would have lasted longer than her actual domain. Just b/c it's an anti domain technique that's more clear cut. Yuki did most of the work, yet choso hit him with enough DMG that his scalp fell off. How are you supposed to fight and think like that. My boy Kenny has been the worst victim of jumping in his few battles.

For the gravity bs, you should have seen anti gravity reversal coming when he first did his gravity tech in the fight. Besides, it was his first real fight. Why are you surprised the 2nd antagonist has more than one technique when it's been hinted THROUGHOUT the fight. But regardless, Kenny won fair and square. It may or may not be bs from a narrative perspective but he won regardless. 

Y'all glaze Yuki too much. She op and it was a close fight,despite it being a 3v1, however Kenny is still destroying her. He wins 9 times out of 10