It's always like that bro idek whenever he plays against rin he loses, then in the next match they always fight to death and then isagi gets better Kinursin
I can see what you mean. But he doesn't really seem to get better; if anything, he just gets into a new flow. I feel like if he loses this match, reality will hit, since it's such a big one. Then we might see a new awakening.
I feel like Isagi needs to lose this match to become stronger; otherwise, winning every game will start to feel meaningless.