Why do people bother?

You know how many people complain about other people? their friends, boy friends, girl friends, parents or whatever the case might be.  Why do some people tend to keep falling back into the footsteps that lead them to getting hurt? Are they really that special?  I get people who are in a relationship and try to fight for what they have, but what about the others? Who never really had or have a chance? People that are just being played with? The worst part is that some people know they are getting played with and act blind so they can be around that monstrous person.  It's crazy how much impact someone can have on somebody. To those people who I just described... Good luck! I'm in the same boat and writing this.  Clearly I need all the luck I can get.