The SSS-Class Madman Carries

A disaster suddenly strikes the peaceful Earth. To save humanity, God grants humans a minimum set of abilities, and with those powers, humans fight back against the monsters. "My gun says it wants to have a word with you monsters!" But the suffering does not end. Just as the monsters are somewhat cleared out, demons appear this time. "Rip and kill!" Then, with the appearance of the demons, angels show up as well, and the two together begin to torment the humans (?). "My fucking huge and beautiful heavy weaponry shall rip you all to shreds!" This is a story about a human struggling desperately for survival against the monsters, demons, and angels that appeared on Earth, ripping and kill...