If the human body is reduced by 200 times, how do we deal with the huge animals on Earth?

The reason why mankind has become the master of the earth is because people have high intelligence thinking and cooperation spirit. Advanced computers can't replace the human brain to handle complicated matters quickly. However, if they kill the earth creatures as they wish and destroy the earth's resources, if one day suddenly reduces you by 200 times, how do you deal with these huge animals?