Jack and the others were fighting with the werewolf monsters with all their might. They got a backup from the army, but those human soldiers weren't much help because the monsters were still able to get up again even after their bullets hit the monsters.
The bullets from Selena were useless, and the regular bullets owned by the army couldn't defeat the monsters either.
Luke was controlling his drones from the car. He had two drones with strong ammunition each, but even if he managed to hit the monsters with the bullets from the drones, the monsters would still get up again instead of dying. His attack was useless, and he couldn't give much help to Jack.
Jack was still in his werewolf form as he fight with the seven monsters. He used all his strength to kick and strike the monsters, but even if he had used all his strength, those monsters were unharmed and still managed to counter his attack with theirs.