As said earlier people will argue this battle for generations to come, but as said Jellicoe was the only man who could have lost the war that day. Plus radio was in its infancy and plotting and giving accurate positions then was very poor, as navigation then out of sight of land was all dead reckoning ( intelligent guess work ). As to the British Battlecruisers it has since come out that they had permission given to increase their ammo loading 50% above designed amount which gave all the problems which lead directly to their destruction. Also prior to the war Jellico was given the task of investigating British Ammunition and Gunnery, so he probably knew its limitations.
As to Hood when the RN tried to get the money between the wars to improve her deck armour, the Treasury said no on the grounds that shells come through the sides not the deck!! But she was greatly outranged by both the Bismarck and her consort, as mentioned earlier she should have had the Prince of Wales leading, and in a computer assimilation game I had once it was the only way to take out the Bismarck, but I have heard unconfirmed reports that Hood went off at full speed leaving the Prince of Wales behind, so that both German ships could concentrate on Hood for some time. As for Bismarck she was sent to the bottom in approx. 45 minutes from start of action by the Rodney.
But like all things we can argue for ever, the real facts are human beings died in their thousands for their country in very nasty conditions, that is what we should really understand and remember.