For The Horde?

I have been a horde player since I started the game 5 years ago. Began as horde and even though I have rolled about 15-20 alliance characters on 5 different servers I have never gotten them higher then level 20. On the other hand I have 5 horde toons over the level of m 80 and 2 85 that are raid geared. And yet with all this time that I have spent with the Horde I have never gotten the "For the Horde" achievement on any of my toons. Why is it so bloody hard? I am on a server that has almost a 10:1 H/A server, it is an odd day when I even see an alliance character and yet whenever I join a group to go kill some Alliance leaders it all falls apart!!!! We will get one capitol city down and either in transit or before we can even leave the city 20 people drop group. On top of that you have the "Leet" players that don't wait for the group to enter the city together....NO!!!!! I AM LEET AND CAN SOLO ALL GAURDS AND KINGS WHILE TALKING CRAP ABOUT YOUR MOTHER, GRANDMOTHER, BOYFRIEND AND ANYTHING ELSE THAT YOU MIGHT TAKE OFFENSE TO!!!!!!!!! This behavior of course causes 5 more people to leave because who wants to deal with an asshat like that, and the whole alliance city is tipped off that we are coming, the guards are all out of place so they aggro onto the wrong raid members and we wipe in a steaming pile of fail, which promptly inspires another 15 people to leave and that is the end of that raid. I have had the achievement on my to do list, ever since they invented the achievement and yet............

Any advice on how to get this thing done or similar experiences or is everyone on my server.........