You cite a bunch of very valid criticisms, but then to say directly to the OP (as they posted their own article) that there is "nothing of value here" is excessive, IMHO, and symptomatic of a kind of discourse that only flies online (unless you would say that to a person's face when they presented you with something they created, and perhaps some people are that direct and lacking in empathetic communication).

Is there new information here? No. But it's presented much differently from the official documentation and perhaps some beginners would find a guide like this less intimidating, more consumable, whatever - people have different learning styles. Maybe the people that would prefer this tutorial over another are a small minority, but I take issue with the sweeping statement that the work the OP put in here created no value for anyone at all.