I never understood how people could be like it either, especially when I was younger. But as times gone on I've realised they normally have their own things going on or a very different upbringing and have just chosen a different path to cope. However there will always be some that just like to cause pain to others especially on the internet where there are no consequences.
RE: Why do you have to be that way? I can make myself feel inadequate all by myself, thanks.