It's never been too hard to get an MLG 50, the only difference now is most of the genuine players have moved on and you're left with a playlist populated 70% with host booters and 5% with derankers.
Play in twos with someone who you can rely on to go + 99% of the time, then even if you have a deranker you've got a chance of winning.
Or just get a booter of your own and take revenge on those who cheat or derankers on your team...