Your best option is to quit and wait for another mmo. Same story is everywhere. In order to do any dps as a fresh assassin. you have to switch to madness. even then it's still bad but more than deception. I had the the same experience. Fresh 50 rank 49 as best gear as I can get after hitting right away(think I had 3-4 pieces). Go pvp, highest crit was a 1100 on an execute. Highest recieved crit 5800(think a warrior smash or something). I was forced to switch specs essentially just to contribute. DoTs interrupted objective grabbing and I had a ranged aoe. That's all I was good for.