The End of Warcraft, I Rub the System with My Hands

[New training system, fantasy + mecha] [Invasion from another world, doomsday for all people] [The protagonist has brains, is decisive in killing, and is unambiguous in doing things] Human, God, Demon? Where are the gods? They clearly exist, so why do they ignore this miserable human world? These demons, they kill us, play with us, trample on us, and... Make us believe in them. We don't want to be slaves, we want to resist, we want to fight, even if we lose everything... But... Is there really hope? Some! Our ancestors did not abandon us. We still have hundreds of millions of human beings. How can we retreat? For mankind, for this human world, and for ourselves, we try our best to fight for the last hope... Gods, I hope you can take a look at this world, look at this human world!