As per usual the people I help in their time of need are never able to return a favor when I need help the most.
There's a reason the world is commercialized, a reason why communism can never work. If my own family can't assist me in a matter that is in their ability, why should I ever expect the same from a stranger, multiple strangers or people I hate?
Hold a carrot in front of someone and they will walk forward because it's their job. Ask some to walk forward and they will think you are bossing them around or trying to harm them.
This hasn't really changed me in terms of how I will treat people but I think I understand bitter people and those who never help anyone but themselves. Assisting others is literally a selfless act and likely one that will not net you anything, in most cases it has never netted me anything.