I'm sorry, nowhere does any of that say "10 to 40 randos with swords and spells can kill an old god in a permanent fashion" so nope, doesn't count.
This is what goalpost moving means on the other side of an argument. This is what it feels like when you demand specific criteria and don't hold yourself to the same standard. It is why I made the previous post so clearly sarcastically.
There's a bunch of lore saying they just keep coming back. That there's no way to permanently kill them. That they can only be contained. And they're based on freaking Lovecraftian deities with the same sort of framing and phrasing for the various hints that they can't die.
C'thun's still there in the desert and we're gonna have to fight him because of the Wound. But even without the wound, he'd eventually return.
Hell, even Y'shaarj's heart talks about being asleep rather than dead.