Crew dying too fast on cruiser

is it normal to loose 20 to 30% of a crew when you get no signifiant damage at all i loose plane catapult and a chemney and lost 20% on the new orlean on the fargo 30% from a graf spee that did literally no damge by hitting upper rear deck how is that posssible just how

il’l add that a destroyer shooting at me make me loose 10% per shot while damaging nothing