MagiusNecros, you seem to take developer decisions that don't align with what you personally want really...well, personally. Try to remember that, one, the devs don't hate Dark Knights or the players that play them, two, they have a LOT of game to focus on at any given time, three, there can be valid design decisions that are 100% opposed to what you personally want, and finally four, at the risk of stating the obvious the devs can make mistakes.

All of those should be self evident. You don't need to feel like you are some beleaguered soul being harried by malicious forces. The devs truly want Dark Knight to be fun and balanced. They obviously fall short in your estimation, and have over and over to you which definitely sucks. I can understand the frustration. But it certainly isn't the fault of favoritism towards other jobs or their players. Design is hard, and a lot of the factors that Developers have in mind when making decisions on how to balance a class simply aren't relevant to individual players of said job.

...I guess the overall point I am making is simply that you should breathe. There are no enemies here, just people that disagree about game design decisions for maximum enjoyment.