User blog comment:Nobody700/Have we seen a 'god disaster level' monster yet?/@comment-27168967-20151219143926

God level equals danger that would spell the end of humanity...

Thinking back on all the chapters read, both Boros and Garou are not at God level disaster ranking. They are both not out to destroy humanity. Boros just happens to drop by to look for entertainment and Garou's intent was more focused on absolute obdience through evil deeds. Both of them never really showed any interest on killing every single human beings alive. Their ranking can be raised to God only if they decided to exterminate humanity.