I hate reviews, by people who don't read the book (or just skimmed)

That, or they either have no reading comprehension, or no memory. I was just reading a review of book one in the POI series and it says 'he decides to become a warrior, and just does it, but without any training'.

Umm, William spends over a year in training, it's mentioned in the book, plus he was studying martial arts for years before the book starts. Which is also mentioned in the book.
It specifically calls out when he starts to study fighting with the staff, when he hires a man to teach him sword fighting, and when he joins a sword fighting display team (and if you think that won't teach you sword fighting, talk to the folks who do it).

I find it weird that people will write a review of a book that they just skimmed, and then claim parts of it that were there, weren't.