We needed these nerfs to get rid of people like yourself. You are bottom half because you aren't playing right. If you don't wanna make the effort to get better, then I don't know what you should play. Right now we can "stand in the fire" heal ourselves and put out ridiculous damage.
Harsh, but... I am agreeing with the second part. OP, if you are having issues being on the bottom of the DPS meters, maybe you should check out Icy Veins or Elitist Jerks to help you fine-tune your playstyle.
Also, I don't see how you can lose so much DPS simply by focusing on survivability. Usually when my raid group wipes it is myself, another Lock, and the Warrior tank who stay alive for about an extra minute or two and still end up doing very respectable damage even whilst healing ourselves and staying out of bad stuff. We wiped on a boss last night, and our other Lock had switched to Demo for the fight and ended up tanking the boss for a good long while when everyone else was dead, haha.
But yeah, I think at this point that it's a player problem and not a class problem. You will need to adapt to the nerfs or go to another class where you might have a little bit more fun. I know getting nerfed can be disappointing, but every class has been nerfed and buffed since WoW's inception and we're all still here. XD