This is supprisingly good.
I mean, his objectives are crazy stupid ("I'm OP, I want to become the OPest ever!")
But for once, it's actually useful for him to be an Isekai MC. He doesn't use his "Japan is the best" knowledge, but his nerdy geeky no-life knowledge accumulated by playing way too much in that world.
This is actually an Isekai, not a rebirth or reincarnation story.
This could actually become my favorite Isekai story.