I have the ship arkhangelsk and it has the worst guns out of any battleships I used, even outclassed by the Italian 320mm guns.
The guns feel like a solid shot despite 20kg of explosive filler, larger than many guns, yet the 410mm Japanese guns, US 305mm guns, do way more damage after penetrating.
In front, the gun is so bad that they yellow/orange cruiser damage modules, relying on ammo elevator hits and RNG for the fire to blow up the ammo.