Re: one bad thing in the world that you think
Hope this stays on the topic, but sometimes when people go through some personal challenges or troubles, they take their bad attitude out on others and don't really care how you feel.
I can't summarize this in one word but maybe someone can help to elaborate. What I'm saying is something like one's ability to control one's attitude toward the other is important.
I just experienced this on a phonecall from a close relative...