Why is Froggy presented like a loser here? She initially freed her friends from the thrall of the Pigeons, then freed her friends from the hypnosis via careful deprogramming, wanted to give the fake defectors a good time in the Ribbit Ribbit Gang and then summoned Bunny Nun to deal with the Pigeons as they proved to not deserve a kinder treatment.
Now Bunny Nun gives Froggy a "be kind to others" note, someone seemingly put Froggy and her Ribbit Ribbit Gang ducks through the wringer and her ability to lead is put into question if I interpret the broken "I'm a Leader" flag right.
I think the end of this arc is pretty unfair to Froggy considering that Bunny Nun used her terrifying presence to get the Pigeons in check, which was not really kindness but force. Froggy used force to rescue her friends and then wanted to treat the Pigeons that joined the RRG but they betrayed her probably because she won the Pigeon Battle at the Convent. We didn't saw any other Nun trying to convince the Pigeons to be nicer so these Pigeons might do the same to Bunny they did to Froggy but they will bide their time a lot more to remove a threat which is way worse than the stuff they did to Froggy.
So, I say Froggy is a good leader, especially considering that she usually treats her Ribbit Ribbit Gang fairly well. Also she deserved a better ending in this arc.
P.S.: Also is that Rabbit or Bunny belonging to Bunny Nun now? When did that happen? And why didn't this Rabbit or Bunny not appear again?