Why was I awarded less stars than other team member?
well on the infamy front, it mostly is the other way round. similar damage will get more stars on the boat with lower infamy. I have also noticed it is based on how you play in the battle. Queen here probably confronted all the attackers head on, taking all the fire while the rest of you were shooting. Alternately you probably took cover behind a few ships while shooting all along...or were hidden from the scene of action for quite some time.