According to some Psychology, the weak get stomped on as a means of natural selection. People have a natural tendency to stomp the weak into oblivion, because it's not a good attribute to have around, atleast that is what my pscyhology teacher told me.
But I don't see this phenomenon happen to me from everyone, only some people who don't know me; aren't as close as my family, and usually seem like aggressive people who aren't upbeat types, just aggressive, stuck up superficial types. I think these people usually think the world revolves around them, so they tend to act like everybody else is inferior who they can't use as a tool.