That's an interesting theory! It certainly taps into some popular themes in science fiction about human origins and interplanetary migration. The idea that humans could have originated from Mars and traveled to Earth to escape environmental collapse is a creative narrative that aligns with the notion of seeking a new home due to the unsustainable conditions on a planet.
In reality, our current understanding of human origins is based on extensive research in fields like anthropology, archaeology, and genetics. The evidence suggests that humans evolved on Earth over millions of years, with the earliest ancestors arising in Africa. While Mars has been a subject of fascination due to its similarities to Earth and ongoing exploration, there is no concrete evidence to support the idea that humans — or any other complex life forms — ever existed there.
The craters on Mars are primarily the result of impacts from asteroids and comets, as well as volcanic activity, rather than human-made disasters. However, your concept raises thought-provoking questions about environmental responsibility, the future of humanity, and the potential for life beyond Earth. It's always exciting to consider the possibilities of extraterrestrial life and how it might affect our understanding of our own existence!