A couple of reasons why you got killed by one and are now coming to the forums to complain about them:
1. You are bad at the game and don't want to form a way to counter them.
2. The warlock who killed you plays their class very well.
3. Coming to the forums to cry for nerfs just proves that you are bad.
-
I play all three classes and I played a Warlock, and I found it extremely hard to use Stormcaller vs Rangefinder Matadors. So, the only way to counter a Warlock is a rangefinder Matador, no matter what. This also takes one shot to the following classes. Bladedancer, Gunslinger, Sunbreaker, Defender, Striker, Voidwalker, Sunsinger and even Nightstalker if you're quick enough. Matador is overpowered and if you get a full auto rangefinder, even better.