1 flaw that cost her. She had three screws with two rudders instead of four. If she had four screws and sustained the damage she did from the TP she could have been steered by using the outermost screws and not steam in circles like she did.
The stern was fundamentally structurally flawed in construction, and the AAA armament was a disaster, among other things.
There's a reason Bismarck was on the cover of Anthony Preston's "The World's Worst Warships" :-)
Sadly I heard Preston passed yesterday.
I don't think you can compensate for a fully swung rudder with off line thrust (at least not from a stern driven ship. I always wondered if they couldn't have blown the top off of the rudder pin and allowed it to fall away.