< 10% did not return to the fleet. Not bad at all.
That’s not “almost all”.
Admiral Halsey was not happy with those numbers and called them unacceptable. The 4,900+ Navy dead was horrendous.
Except for the thousands of sailors and Marines who went down with the ships... Similarly for the hundreds of ships damaged... Blow a gun turret off the ship or a hole midships and the men killed and wounded think it is "bad"... How many men were killed and wounded when the ragheads rammed a small boat into a destroyer?