Depends on which one you want to play, each one has its very own weird player base XD. Take Modern Warfare for example. Just like FIFA, they release the same game as a new one with new guns to grind for with a few new maps. Once their grinding session is done, they move over to BR and get clapped by hackers XD.
So... before delving into this mess... try to look for one that you know you would enjoy regardless of a win or loss.