It's Not Me Who Caused This World to Collapse

The plot is purely fictional, please establish a correct outlook on life and values. This story does not take place in the real world. The gender, name, values ​​and other contents of the characters may not be consistent with public perception. Please read it as an imaginary time travel novel. The pace is a bit slow at first, and the writing is a bit bad. I don't really want to change it, so I'll give it a try. There is one and only one female protagonist. (The protagonists of other timelines have harems. What does it have to do with me, Gou Dandan?) The protagonist is just a five. Even in the end, please don't have too much hope for the protagonist's combat power. After all, he is just an "engineer" Because there is mining and tide every day, there is a high probability that it will be updated once a day. Love you duck There were many worlds before, and they all collapsed. What? I don't know why! It's not me who caused this world to collapse!