is irony a human nature?

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I find people are more sophisticated in satirizing than praising. When you do a wonderful job, people always just simply say "it's ok" instead of expressing their truely pleasant feeling, but if you screw it up, thousands of ironic words will beat you up and push you into the hell. What is wrong with that? Also, I realize people usually like to hear something bad happened to others, it seems that it can make them high. What is that problem? Is it a human nature?