Well winning these types of competition requires extensive infra and training with ample amount of time.isn't 24th rank very bad for a tire 1 unit .
If I remember correctly, Small teams of Devgru and Delta force spend about 3-6 months solely training for competition like this .
So does GROM.
Poor perfomance of GROM shows they probably didn't train enough for it.
Their is another competition , I believe its called Delta cup organised by delta force.
Most tier -1 unit take part in it including SAS, SBS, JW GROM , French , Mexicans , Brazilians , Australians , kiwis, etc.
GROM usually always comes in top 5 in that.