Regretful World

This story isn't about the main characters. This story is about the regret that side characters have.

'It is the end of the world!!!' People were screaming that sentence and running, in order to save their own life. They were selfish creatures. They were living for their own gain. But it was the end of their selflessness. The world was angry at them and it was the time for its revenge. However the cause of this hell wasn't because of the World, since humans created their own apocalypse. Nevertheless, humans would blame the World for that, never thinking that their actions were the real cause. Then someone appeared, wanted a change and caused a change.

English is not my first language. If there's a mistake, warnings would be appreciated.