People can hate all they want, but this is the kind of stuff I want to see from an isekai hero's cheat powers. Not 'Oooh, dark and edgy, now I've got slaves.' or 'I can make and do anything, but I never actually do anything useful.'.
He just app-killed an entire army. People were dying down there, living the worst and final moments of their lives, hope was lost, they'd never go home again. He effortlessly solves the issue and fixes everyone up. Just like a hero is supposed to. Those guys get to go home to their families now.