been using bad tactics, bad lists too. Wych Cults still work, not like the previous wych Cults, the first WC actually have nothing to do with the current ones. This army proved to be not your thing that's just it. Dark Eldar aren't an easy to use army, the cool new minis made it attractive, but in game it's something else. If you give up this quickly, you are correct to move to chaos, marines, whatever, have fun with your new army ^^.
change is natural and it is normal, GW wants us to buy more stuff, they may be friendly, but they're mostly after our money.