There are two separate issues with fate of Amaurot. The first was around the destruction wrought by the Final Days. I think that people on the whole view those events sympathetically. The destruction that it caused is not unique to Amaurot. We've seen what it did to the various civilizations represented in Ultima Thule, and also within our own society. You could say that the Final Days and the drive to live on in spite of it represents a common ground across all life.

Then there is the political in-fighting between the Convocation and Venat's faction. There really isn't enough information to make a clear cut decision around it in favour of either side.
  • Why were the Amaurotines, a highly scientific people who viewed their Creations as a tools, suddenly describing Zodiark as their 'God' rather than just another Creation?
  • Why were more sacrifices necessary - was it to fuel the aether required, or because Zodiark was hungry and demanded it in exchange for cooperation?
  • What are the limitations of Zodiark's powers - could He infinitely generate new life in exchange for sacrifices, or did equivalent exchange/conservation of mass/energy/souls apply? If it was the latter, what was the point in more sacrifices in the first place?
  • Were the Convocation acting this way because this was their plan from the outset, or did the summoning aetherically corrupt them in a way that rendered them His devout servants?
  • Who was intended to be the next set of sacrifices - was it vegetables, as was frequently posited by part of this subforum, or were these the other human races that occupied the World Unsundered outside of Amaurot?
  • What does it actually mean to Sunder someone or something? Is it murder or mitosis?
Without having unambiguous facts around this political clash, you can't even begin to engage with it, because you don't know what was the risk of leaving the Convocation unchecked vs. performing the Sundering open rebellion against the will of their government. The last question in particular is fairly critical, because Sundering is a action that has no real life equivalent.

So the result is this circular discussion where you end up obliquely trying to argue that the Sundering technically kinda sorta maybe could be like murder in your personal headcanon, or maybe genocide because that makes for a better 'gotcha'. All the while trying to provide justification for why the Convocation in their infinite wisdom was justified in deciding to sacrifice fourteen worlds to sate their God in the hopes that he would reinstate their long dead utopia. Unfortunately, you cannot ignore the history of this game across the previous five expansions, and the narrative is such that you're going to run headlong into a contradiction every time that you try to do this.