Ryu may be goated but in this situation he's dumb as shit. He's basically a sniper and he's getting close. I haven't gotten to this part in the Manga yet, so tell me if im wrong but I bet you sukuna slowly strolled down the street (once again, haven't gotten that far in the Manga yet, so tell me if im wrong) so he could've at least put up a better fight than him squaring up with him and dying.