Wrong Timing

Why is it that whenever you think things are going well according to plan, unexpected events would come up and would either complicate things or would make things worse?

SOmetimes I feel that the more I try to help, the more useless my efforts become. Nothing happens.. there will always be a reason why things just couldnt be done the way you want them to. My sacrifices which its purpose was to help, seems worthless each time my plan fails. Whats the use then? I could give up and just dont care, but that's an option I dont want to take, because you're failure is my failure.. I care. And I hope I could see that you do too, so that nothing is wasted.