The good teams don't gas out because they are the ones handing out the thrashings. Players are just wilting under weight of points.
Basically it's the good 3 or 4 teams who thrash everyone
The shit 10 or so teams who get thrashed by the above and take turns thrashings each other
And the even shitter teams who get thrashed by everyone
Mate, just assemble a Grand Final winning squad.