This is not correct :\
1) AP Rockets merely Pen or shatter on Battleships. They are implemented in the game to be a citadel threat against same or lower tier Cruisers. While they can pen a DD if they strike armor at an angle, they are likely to Overpen a DD for minor damage, or merely pen a Battleship for minor damage (to a Battleship)
2) You are saying you "instantly killed" by "four passes" from a Soviet CV? As Soviet CVs only attack once per strike (it's their gimmick), the CV would have had to fly back to you 3 additional times to strike 3 additional times. That isn't instant.
Furthermore, why would you not have used heal in that time? or off-angled by 10-20 degrees to mitigate incoming damage? It's not about full turning against a Soviet rocket strike, a 10-20 degree offset can be quite significant.
Further again is the knowledge that Soviet CVs carry HE ammunition. After dealing damage and saturating the target, the damage would be reduced in half while striking damaged areas on the ship.
3) Whether you have interest in CV play or not, understanding your enemy is extremely important. If you don't understand how something works, then it's easy to assume it's omnipotent. Playing it will disabuse you of that notion. While there are excellent CV players that exist in the game, Tier 4 CVs were nerfed considerably quite a while ago. They are no longer the unholy terrors that they were.