V has Olympic-level reflexes, enhanced strength, speed and dexterity as well as expanded mental capacity, and relies on his wits and his planning to get in and out of any confrontations.
Doubtless he could've foreseen, and prevented himself from, being shot by Creedy and his henchmen who "swept the place clean". Even as they shoot him, V just stands there until they run out of bullets. Only after, V starts throwing his knives!
Why? V could've thrown his knives as soon as they started shooting, and mitigated the gun wounds on V that proved fatal.
Before arriving at that basement (what's the correct term?), he could've armed himself with a gun, then use it to shoot back.