Why was Kariya so eager to have a second showdown with Tokiomi at the church when he was effortlessly BTFO'd the last time? Is it the worms eating his brain? But his goal from the start was killing and usurping Tokiomi's place in his family. So why is he saying "oh this wasn't how it was supposed to be!" when someone else kills him and Aoi sees his corpse when that was exactly what he was trying to accomplish the whole time? With Kerry, Waver, and Uryu we know most questionable choices they make stem from their character flaws but with Kariya, Tokiomi, and Kayneth I can't tell if it's intentional, them just being latently stupid or a fault in the writing.
Also, why do people wank Berserker so hard when Zouken chose him to torture kariya some more, not secure his victory? His strikes outweighed his successes in the story.