This book it’s the first of a great series that is internally consistent and somewhat believable with just the assumption of continued technological advancement. I think most of the ridiculous parts actually have analogies to what has already happened in human history.
That makes this a better than average litrpg.
But the best part is that it isn’t an RPG set up to be fun for the player. It is set up to be entertaining for those following the players, which it really really is. It is a perfect setup for a book because the more entertaining it is, the more believable it is.