I think the creator of the video missed the point of the last two games. The fact that Kratos single mindedly destroys anyone that stands in his way is not only fitting for the real Kratos (Who was a simple minded slave of Zeus.) it made sense for Kratos to fixate on him as the symbol for all of the lies that the gods told him. The reason he did what he did as the God of War had everything to do with his inability to come to terms with his own guilt. Besides by the time that GOWII started Zeus had already become mad with fear, it merely came to a head in the third game. Look at how Zeus tricked the mortal to build that maze, the man did everything right and was he rewarded? Hell no! Instead he was locked away inside the maze. Zeus had become exceedingly cruel and every other power out there wanted to either kill Kratos, or use Kratos to destroy the Olympians so that they could lord over human beings.
Kratos on the other hand just wanted to kill Zeus and absolutely no one else, he didn't even necessarily hate those that stood against him like Hephaestus. The only really evil or malicious person was Zeus himself even before he became mad with fear. He used Kratos to solve his problem with Ares, something that he was more than capable of doing on his own, then he has Athena string Kratos along until the deed is done and then surprise, surprise they can't take away his pain ever.
Kratos on the other hand just wanted to kill Zeus and absolutely no one else, he didn't even necessarily hate those that stood against him like Hephaestus. The only really evil or malicious person was Zeus himself even before he became mad with fear. He used Kratos to solve his problem with Ares, something that he was more than capable of doing on his own, then he has Athena string Kratos along until the deed is done and then surprise, surprise they can't take away his pain ever.