and for everyone saying it's so casual etc. allow me to clear this up.
I think the world you're looking for is "simple vs complex". Which is completely different from "casual vs competitive". Casual is what this game is if there is no competitive community that forms around it. Simple is just less game mechanics than other shooters. ie. No medic bags, no ammo bags, no ammo full stop actually... no reviving, no reloads, quick hp regen, quick respawn. these are all a lot less complicated than say BF4. However, casual vs. competitive is %100 down to the people who play it, and the community around it.
As I've said before, our planet's #1 competitive sport is football (soccer), and that's just about as simple a game as you can get. simple does not equate to casual. I'm sorry, but counter strike is a damned simple FPS, and it's by far the #1 most competitive FPS game we've ever seen, and will probably continue to be for years to come.