The COD community is really strange. I've played loads of competitive shooters and this is the first where people have open disdain for fair matchmaking. It seems all people want to do on this game is farm new players. In any other comp game this is called smurfing and is seen as a negative way to play.
Even more puzzling is the devs haven't even given the last word on whether its implemented or not which leads to people blaming all their ailments on it. Compare this to any of the Halos where the devs came out and said day one that they want fair games.
Call of Duty never was about being competitive.
Its know for being the "arcade Shooter".
There is always a Ranked mode if players want to be competitive. Right now MW doesnt include ranked mode.