First of all, make sure you are playing on prime (most cheaters get banned until reaching that level) and you are not accusing players of cheating just because they killed you. Remember that some players have a lot of gamesense by playing a lot, at some point you can "read" what the enemy is going to do and is easy to prefire/kill them(this is the point you would be calling them cheaters). In case yu play against spin botters/rage hackers just try having fun with your teamm8s, those games are awesome for me :D Getting angry sloves nothing.
And yeah, if you are low-level there might be a lot of smurfs aswell, I love how I go to chill playing on my gn1 acc and happens to play vs a supreme smurf and actually having to try hard to win the match :/