@aggregatedretard
You forgot the nature of the gods here.
It is the same reason why Gilgamesh lose to Shirou while there is no way in hell Shirou would win against Gilgamesh if he fights seriously.
The gods always look down on human.
They are prideful, too prideful, so prideful it has been shown since the beginning of the chapter.
They wouldn't want to go all out on a human at the first minute of course , that will hurt their pride.
Moreover Zeus and Shiva.
Shiva already show the arrogant attitude in the first few chapters, moreover Zeus the God who govern over all Gods.
Do they know those human have those potential? No they don't until lately.
All they think is that they can one shot the human, which is wrong.
So there you go. The reason why it doesn't make sense but it makes sense. The gods are arrogant beings.
Same case as Poseidon. Until Kojiro show a threatening abilities, he won't want to make the first move. Cuz he thinks no matter what Kojiro throw at him, he will be able to deal with it. Cuz it is shameful to be the first one to attack. Only the weak take the first strike advantage, that's what he thought.