Chasing games to win is not a good approach, if they were not lucky, they would have lost the game.
Chance is always an important factor in many sports, and football is not any different. Otherwise, if the outcome of the games were generally foreseeable, betting companies wouldn't be profitable. We tend to think that some games' results are evident, but that false sense of control is what makes us lose most of the times when we make our bets.
Well, this is exactly what I have been hearing since the beginning of this year's La Liga, but about Xavi. It seems that doubts about one or another trainer arise when the results start not being as good as one could expect, regardless of the decisions he makes. Again, chance is an important factor; although the trainer is important too, don't just blame or praise him for everything.