Best advice ever:
Please calm down and take it easy. You will live longer and happier that way.
If you feel you got/get screwed when you are P2P: Don't put money in anymore
If you feel you got/get screwed when you are F2P: Don't put your units in the offer(s) that you feel are bad
In the end, it is just a game. And if it is not just a game for you and you don't like the way things are going: Maybe it is not -the- game for you.