How Numbers Rule The World is mostly not about the use and abuse of statistics in global politics as promised on the book's cover. The lack of good, appropriate statistics, the over-reliance on only seemingly objective measures is a theme of Fioramonti's book, yes. His focus, however, is on his aversion against market solutions to social challenges and the creeping commodification in all domains of life.
I agree, a badly designed market, a sloppy implementation of a well-designed market, special allowances that circumvent the intention of a well-intentioned policy (like a market for emissions) are all issues that deserve a good rant. (Blind) Management by numbers, fudging of data, badly designed incentives, and rent-seeking behavior are also topics that deserve a good rant. Put these in a book with a title that promises an in-depth analysis of the use and abuse of statistics in politics, how statistics shape the world and you have a serious case of false advertisement, wilful deceit, and a disappointed reader.
Pair this with constant references to non-relevant (to the current issues) quips by prominent and less well-known persons, references to anecdotal screw-ups in support of your rant, and the occasional tangential discussion of philosophical issues and the reader is not just disappointed.