To sum up what everyone has said run away as fast as you can, and hope and pray, while dodging torps he'll spam HE at you and you'll burn to death anyway.
At 4km in open water, yeah a but more attention but BB are usually busy dodging torps, being set on fire, dodging torps, prioritising your AA on torp bombers , checking your damage control to see when you can put out the fire, dodging torps, burning some more, getting spammed with HE from cruisers, dodging torps. (some where in there are multiple citadel hit cruiser broadsides )
Around Islands its just tough luck they appear from no where and there's usually nothing you can do its a losing battle, distance is your only survival tool, other paying attention to the map.
As said already load the HE dont waste your shots on a head on wait for the turn, then make sure each shot counts.
And always think torps - because there will always be a DD usually IJN somewhere watching you 7km away invisible to you who'll use the aim assist marker to spam a tight spead into your flank, aim assist was too cheaty for BB's regarless of accuracy RNG but not for a 90,000 potential damage torp spread with zero RNG.
AMX 13-90 with a autoloading BL10 is what a DD is.