He wasn’t getting overwhelmed for a chunk of the fight, even before the so-called “rage boost” Jinbei was doing just fine against him (and this is just from 1018, prior to this chapter neither of them had a crazy advantage over the other)
The only part of the fight where you could maybe argue he was being overwhelmed is the very beginning of the finger pistol barrage… which Jinbei counters not even a full page later by breaking one of his fingers then proceeding to break both of his arms
As soon as Jinbei went all out Who’s Who got washed