If a person is reasonable, this walkthrough will be very helpful to them. It's clear that a beginner won't be able to complete it in 8 days (and many "non-beginners" won't either). If a person just wants to play through the campaigns for fun, they don't care about the number of days; the principle is what matters. Besides, a fan-made walkthrough of ALL the campaigns is linked at the end of the post.

And if someone thinks that another person did something poorly, they always have the opportunity to do it better and post it for comparison, instead of just spewing negativity!