Does halo not reward you for accuracy? A better example would of been cod
Halo requires you to unload the whole clip into someone to kill them for most guns.
Headshots aren't as important as they are in CS. Same with actually requiring strategy and tactics like in CS.
And if someone ever got the drop on you, you can always take them out with you with a well tossed grenade due to the high TTK.
High TTK also means youre screwed in most situations where youre outnumbered cause its harder to clutch.
Its a completely casual shooter with outdated gameplay, and the art style feels dated as hell today.