British wartime built destroyers had wartime max crew of around 200-250 men. Prewar destroyers had less. This is debatable matter. However, at the morning 27th of May 1941 when KGV and Nelson showed up, Bismarck was doomed. She wasn't going to stay afloat for long, I'm sure RN would have even rammed her if needed. She had ample time to surrender. Her officers choose not to do that.