Why is there a mission to lose a co-op match?
Most players won't be able to do that legitimately, and will need to AFK, int, or otherwise assist the enemy team in order to lose to bots. Why is Riot encouraging this behavior? On top of that, I guarantee you some people won't notice the requirement to do it with a premade, and will AFK, int, etc. with random teammates who intended to win (as everyone is supposed to). Call me a stick in the mud, but encouraging this sort of behavior is a bad idea, even as an April Fool's thing.