Got to argue, I'm a 39 year old gamer, started with PCs back in 90s.
The games are casual fun, they work great as co-op shooters. Story is what it is, but the games themselves are lighthearted and just pure entertaining fun.
Not masterpieces. Just good.
I guess his premise, that it's for edgy teens. Heck, half the pop references were ancient on launch.