Why Game of Thrones is deteriorating as it moves away from A Song of Ice and Fire

Game of Thrones is awesome, no doubt about that; David Benioff and D. B. Weiss are dedicated, Peter Dinklage and Charlie Dance are captivating, the costumes are great and the opening title is something that truly shows the scope of Martin’s world in an interesting way. But there are only so many things one can do good.

There were problems from the beginning only, but the harm they did was not that visible. Here are the problems that have been choking the series from the beginning (Season 1-3, ie, when they had yet not deviated too far from ASOIAF).