I still want to run a test where I manipulate crew "goodness"

I still hypothesize that by manipulating the crew ability, that it might be possible to make the English weaker and the Dutch stronger, to better portray the actual performance in the First Anglo-Dutch War. I just manipulated the crew value for the Battle of Monte Cristo, so that the Dutch were "good" and the English were "mediocre". Perhaps you English would object, but I am struggling to explain why the English did not obliterate the Dutch in the war. Instead, it was only in 1653 that the Dutch took even 10% losses in battles. I would appreciate alternate explanations.