Because the whole motivation for him versus Zeus is retarded. Kratos was just an Ahole killing people in Athens... and then when Zeus stops him, he's like "You've Betrayed MEEE!" ... I'm just like... "really?"
Worst plot device for any game I've ever liked.
His motivation for getting Aries in GOW1 was justified, for GOW2 and GOW3, defiinitley not.
Kratos was conquering and killing because he was still pissed over the gods not taking away the visions of his atrocities. He already felt betrayed. GoW 1 was actually about Kratos' final task (kill Ares) in his 10-year service to the gods, after which they promised to take away his nightmares, but then they didn't. It was only partially because of getting revenge on Ares, Kratos seemed like he had never entertained the thought of a man killing a god before Athena told him. Then, in 2, Zeus wiped out Kratos' army and killed him. At the end, Kratos accidentally killed Athena, a rare friend on Olympus, because of his rage towards Zeus. Kinda similar to the family incident, and another thing he mentally directed at Zeus
Ascension is pretty much 100% inconsequential, kinda pulled out of a team of asses. I think me and a lot of others, upon hearing about a preprequel, expected the game to hopefully expand on, if not let us live through, those crucial events in Kratos' life that they've told us about since the first game. But nah, furies