The Bismarck was not "tied" into a steep circle as many think, but restricted she was. Anyway, she faced HMS Rodney which beat her to the first hit, penetrating the fire control quarters. (Take it with a grain of salt, I am running on my memory here). Bismarck was hit hundreds of time from various vessels of the RN, ending up as hopeless. I have not seen any source of the Bismarck hitting anything back by the way.
Although well armoured, the Bismarck and Tirpitz were nothing undestroyable. By the way, HMS Prince of Wales did score on the Bismarck. The shells were smaller than of the 15 inch gun (Bismarck, HMS Hood, Warspite etc), "only" 1.500 lbs or so, but enough.
Tirpitz did get bombed before, but the eggs were not heavy enough....