Knowing how good this author can be and how good the story can be, all I have to ask is: WTF Jack?
"Crunchy" is an understatement. The boom has so many numbers and checks that they dominated. Totally takes away immersion.
The MC is pretty much a lackluster loser who at one point pines for life back on Earth which by his own definition is boring, privileged, spoiled, and everything that is wrong with modern society. I generally don't like characters in an isekai who get sent to a place with literal magic and can use it, wanting to go back to Earth. Unless you give them a really compelling reason for actually doing so, it just doesn't work. Few pull it off well. But when the cited reasons are trash, then it is far more off-putting. "Job security" was cited as one of the reasons, as if that is a thing in the first place, let alone a compelling reason to return to Earth. I get safety to some degree, if I am being realistic, but the point is to escape reality... Having an MC like this just isn't compelling. I don't want to follow a person around who is so spineless.
I get it is haremlit and I don't mind that, but descriptions of the women and other sex-related things sometimes come at very awkward times and it's jarring.
Overall, worst Jack Bryce book I have ever read. Read literally anything else by him, and you'll have a far superior time.