The question is pretty clear, so I'd say what I think.
Perhaps several years ago, thingies like Fortnite, Apex Legends, Warzone and PUBG, became the norm for non old school gamers. It feels like a disgrace, considering there are so many good games, that are providing less of the 'mindless' experience, and more of cooperative/strategic/multiskilled gameplay. Why has this happened?! Is it the option to dance on somebody's corpse, while a trendy song plays in the background, the reason for this shift towards brainless battle royals. Or is it, perhaps the small competition - 1 out of the 4 people in the team survives, and while the other 3 are watching, he is showing off? Or is there something more to battle royals I'm not seeing?