Indeed. Athena always challenged those gods who abused their power and aimed to harm humanity, but as a Goddess that doesn't aim for destruction she always held back and her Saints never were able to kill the gods. They were sealed at most and only temporarily, not sure why.

It wasn't until my generation that Athena finally said "fuck you all" and aimed to kill one of the main gods.

[He's not really sure why such a different treatment between Poseidon and Hades, but his guess is that Poseidon, albeit an asshole, didn't want to just destroy the world and kill everything. Sure, he wanted to kill a lot of humans and succeeded in that, but he didn't aim for their extermination as much as Hades who wanted to even kill plants.]