Just do what most of these so-called "people who earned their ranks" did... Do your weekly challenge log Wolves Den victories by que'ing D with two grousp who's average PVP rank is the same. You do win-trades like this for 10wins/10 losses (That way your other team gets their bonus too) and it gives you a nice chunk of EXP.

Most of these people who claim they 'earned' it just put in more time wintrading.