Collonello won because Lal is no longer a baby and that's what he wanted.
I liked this chapter only because of the beasts in the hospital. It was fucking hilarious.
So, the supposed 'final arc' was not at the end, figures. But now, I don't what else this manga can have, srsly.
Well, hoping that the new arc ends to be better than this one, which was a failure imo.