This manga if anything damages the reputation of the novel. Pretty much everything after he got rid of his guns was just awful story telling. And the elf girl is just a horrible character. There was no real resolution to the incident with the prince either. Like this can't even be a bad isekai power fantasy. Because at least in those the world bends towards making the MC a badass for a power trip. This is just a moderately interesting MC, that makes the occasional badass decision, but even when he succeeds it's a 'fail'. And not because of the good reason like "Fighting doesn't actually solve problems" but because his own 'team' wont let him solve it. The only 'good' thing about this manga is the world design, the cat, and the sassy robots.