This, also when posting stuff like this it would be useful if you provided some more info like which class are you playing etc. Perhaps structure it a little better so that it doesn't seem like a random rant/troll
I'm playing a DK (UH tho and I don't pvp much) but if there's one thing I can tell you for sure it's that Death Knights are not nearly as good as they were in WotLK, not by a long shot
. In fact as of now we are one of the most kiteable classes out there.
I have no idea what lvl of pvp you are high/low ranking, but chances are the DK's you're facing against are either really good at what they do, or you simply need to learn how to counter them properly
And I'm not saying this to offend you, it's just a fact I learned over time in wow - if you can't handle some class/boss you just need to see what can you do to improve on it!
A great way of going about this is talking to some of those DK's and asking them or your friend DK's on the playstyle and how they pvp - perhaps try rolling a death knight yourself? So that you see exactly where their strengths and weaknesses lie
.