Maybe if you stopped focussing on the negatives, you can see the bright side of life *if there is one that is cough cough*
But karma isn't as simple as good luck and bad luck.... in fact its probably the least about luck and that. Its not random, its very well planned out, you don't just do things by random *regardless of how much teenagers claim to be* and so karma doesn't occur randomly either, unlike luck.
What goes around comes around, what goes up must come down. What you put in is what you take out, the Law of Conservation. In a sense these quotes are all about karma. You can't wait for thing like karma, you can't think that you've been a good little girl or boy so that you can push some old lady off the bus and your good karma will just cancel out your bad action. No it just doesn't work that way. Why is it that humans get so caught up over the small details like getting cheated by karma and just take for granted the other things like you still FREAKEN ALIVE for one.
Perhaps you should stop. Really fully stop, just sit there, clear out your mind and be completely honest with yourself - you know you can't lie to yourself, that tugging feeling... its called guilt. And just think why is it not working, why is it that I do good but karma doesn't seem to notice? Am I still doing something wrong? Is there anything more I can do for the betterment of everyone and thing?
Sorry to be so abrupt but that fact that you have posted something like this questions your faith in karma, the more you question things like when will karma bring good luck to me the less likely it'll come anytime soon *try it if you don't believe me*. Also no offense but you appear to be complaining about karma to me, funny, come back when you've lost EVERYTHING then you can complain.
Just let things take its natural course.