i really hate it when the author cut the war arc in elf city to go on a lengthy flashback leading all the way to that war
i understand that the author plan to confuse us by making us think kumoko and the hero's timeline overlaps then drop the plot twist that they were actually some years apart, but it's a huge let down and a hella mess because the author picked the wrong time to go into full flashback mode
just burn the elf bastards up first before doing the damn flashback