Here is a direct quote from Wikipedia on what a Battleship is and its history. I have highlighted what i think is an important part.
Nevertheless, some historians and naval theorists question the value of the battleship.[4] The Battle of Tsushima was the only decisive clash between steel battleship fleets and, apart from the indecisive Battle of Jutland, there were few great dreadnought clashes. Despite their great firepower and protection, dreadnoughts were increasingly vulnerable to much smaller, cheaper ordnance and craft: initially the torpedo and the naval mine, and later aircraft and the guided missile.[5]
So Battleships have always been weak against smaller, faster moving targets as they are designed for anti-capital duty. If you want to engage fighetrs ask the designers/developers if you can help them design an AEGIS cruiser or something.
