Azem had no involvment in the Sundering whatsoever - you know, they remained neutral in the whole schism between the Convocation and Venat's loyalists (why else did they end up Sundered?). So saying that Venat made them complicit in the genocide of the Ancients was hyperbole at best and outright rubbish at worst.
Saying that due to the WoL killing the Ascians, technically only Igehoyrm was outright killed by the WoL, all the others met their ends in different ways and/or by different hands:
Nabrieles was killed more by Moenbrdya sacrificing herself to power the Blade of Light, although the WoL did land the final blow, it was only due to Moenbrdya providing her aether to do so.
Emet merely faded back to the Lifestream after his defeat as Hades, having finally made peace with himself and accepted the end
Fandaniel tried to kill himself as Zodiark only to fail and end up back in the Lifestream where his memories reset back to Amon, and then he went and got dragged back to the Lifestream by Asahi's vengeful spirit (as payback for Fandaniel possessing Asahi's corpse)
Elidibus sacrificed himself to open the portal back to the past (by his own choice too), having like Emet accepted the folly of the Ascians' plan and put his trust in the WoL
Lahabrea was killed by Thordan consuming his soul as aether to power his Primal Form
Mitron was killed by the WoL in body after he was freed from Eden, but his spirit remained and returned to the Lifestream, once again having accepted defeat and changed his attitude
Venat... kind of commited suicide in a way (even if we failed and the Exodus went ahead as she had planned, she would have remained behind on the dying planet and died to Meteion's onslaught eventually anyway
And of course, Loghrif is alive and well as Gaia.
Killing one sundered Ascian and two sort-ofs hardly counts as "complicit in the genocide of an entire race."
As for being the WoL supporting Hydaelyn/Venat, well, considering the alternative was... you know... destruction and almost certain death, of course you're going to throw in your lot with the kindly mother goddess that does nothing but try to protect you without forcing you to do anything, as opposed to the black-clad sorcerers who crow on about "the one true god" and are almost invaribely belligerent (up to outright declaring that "you have to die" paraphrased, but it was said repeatedly by them), that exercise an extreme form of racial superiority ("I do not consider you truely alive. Ergo, it would not be murder if I kill you."), and care nothing for the destruction they cause.
Supporting Venat/Hydaelyn isn't even in question in that regard.