Eventually he discovers that the reason this world looks like his favorite video game is that the head of some big organization in game land is ALSO from our world
If the "archwizard"/ceo is antagonist, you can drive home the isekai trap by having him constantly crunching numbers and making decisions about "number go up" to the detriment of the world around them
Is it more interesting if the Archwizard is or is not the antagonist? Plus how many real people did he adapt as NPCs for the game?