What? No. Kafuka is pure innocence and love.
Using a chef's knife to slice ingredients for soup stock? Perfectly normal. Saying Chiri was a ditz because she burned up the school? Average response. It's not like situations like that doesn't happen all the time in ZS anyway.
I think the animators can't handle what a sweet angle she really is, thus they try to make her look bad as much as possible in the way they portray her. But they can't hide the truth, the parts where Kafuka's charater was proven. One, you can't forget that in the alternate universe where everyone was opposite, she was as despairing and insane as Zetsubo himself. Two, you can't forget the most important depiction of Kafuka, where she is portrayed as the Buddha. With these in mind, it is obvious that Kafuka is the epitome of all that is good and sweet and pleasant in the world.