I can only repeat that the video evidence does not support it being blood.
I make it 2 minutes and 24 seconds from first pops as boat comes alongside until stains are seen. What became of the victim in that time?

Ten feet to the right of the ladder is a bin with a blanket on top.
How did blood get on that?
Further right still a second bin is liberally smeared.
It could not have come from the hatch.

As time went on, people were exposed to the projectiles at close range. Not fired, against gravity, up to the decks of the ship, from a boat at sea level

Espen Goffeng was doing great service as an objective journalist showing the world what was happening. I admire that.
He then saw the violent deaths of friends and comrades, and like all the crew was treated severely by the IDF.