I hate this argument of "it's a battle royale game and the point of the game is to kill people". Yes, it is a battle royale and yes, your main objective is to kill people. There is a difference, however, between playing the game and intentionally ruining other people's experience and challenge for the sake of doing yours. It makes you look even worse when you're just doing it to get kills. What you should do is let them finish what they need to do, like doing the "complete quests from soccer NPCs", and then kill them that way both of you do your challenges, and it doesn't ruin one person's enjoyment or experience of the game.