They always tried to present her and the Endless as a threat to every shard, yet the only time we see them invading they are defeated within less then an hour after one nation preparing itself for maybe a week? I always found it very weird that they were shown as being so weak and incapable of conquering anything substancial. If they had opened a connection to the First or the 13th, the Voidsent or the remaining Sineaters might have eaten them all.

I have less an issue that we had to resort to genocide to stop her but if we have to pull that ultimate card then maybe present the enemy as something competent and really threatening, not someone who failed 10 minutes ago to invade a barely prepared single nation. With the Ascian we knew they had to be stopped at all cost. With Meteion we knew we had to stop her, no matter what, but for the Endless we could not find some minutes to even think about an alternativ? The WoL forgave Meteion and tried to free her from her evil, although she had murdered whole planets worth of people. After she "helped" whole planets to pick the path of despair? As far as we as the WoL is concerned, the only dangerous true Endless we ever encountered is Cahciua.

Although it would be quite the plottwist if it is revealed that she was the crazy one that just wanted to commit suicide, but did not want to die alone.