You are all looking at this wrong.
You see the useless people on the small ice? Small fish feeding at small plants.
Those are the people you couldn't have depended on to defend you at big ice, you'd have depended on them to be useful, they wouldn't have been, and you'd have lost because of it.
Now you know how many people are useful, and how many people on your team are NOT useful, at a glance, after just 10 seconds.
What you have to do is adapt.
Notice that the people on the other team are also sitting on the small ice, just piles of people who arn't good at pvp, sitting there, easy to kill.
Fill up the limit break, rush in, harvest all of them, and then swim away.