Now THIS is how an isekai should be
No dumb shit (op protagonist, harem with girls thirsty for MC's dick, lackluster worldbuilding by assuming that everything "just works", random encounters that go well for MC)
MC takes time to learn the ways of the land and immerse himself in the world
Worldbuilding is done through situational dialogue (economics through the negotiation scene, etc)
Also, cool fish guy with shades