Let me put it this way: have you been able to improve the situation using your approach? It's not about a person being better than another person, it's about working in a way that is successful. I'm saying that the other side of the equation thinks that they have to treat people poorly or else people will take advantage of them. Your behaviour will only reinforce their belief. My challenge to you is to find a way show them that they are wrong. If you succeed, then life will be better for everyone, not simply tolerable for you.

It's not going to work all the time. Some people are jerks and there is no way to convince them to work together with other people. They just take everything they can and give nothing back. My experience is that these people are pretty rare, though. The vast majority of people who act like jerks do it because they are convinced that there is no other option. I'm not saying that you are being a jerk, but the attitude that you espouse just reinforces their view. They believe that they must take everything, or there will be nothing left for them. They believe that they can't give anything back because it will all be taken from them.

Give something back for free, even if they give nothing back. How much you give is still under your control. It won't always improve the situation, but my experience has been that it will sometimes improve the situation.