The only consistent criticism is the weight. At nearly 2.5 kg (5.5 lbs), this is not a book you read in bed. It is a reference book that lives on your workbench.
The Collins Complete DIY Manual is divided into several sections, each covering a specific area of home improvement: collins complete diy manual
The Collins Complete DIY Manual isn't trying to be YouTube. It is trying to be a university professor. The only consistent criticism is the weight