Not sure what to think of this, apparently Tkachuck made being named captain a contractual requirement, and Giroux learned about it after signing and isn't happy
Starts around 14 min mark but it's a French podcast
Tellement hockey | La première journée d'autonomie dans la LNH a donné lieu à beaucoup de mouvements spectaculaires, notamment à Ottawa et à Columbus, tandis qu'à Montréal, les choses étaient plutôt tranquilles. Les espoirs du Canadien ont fait l'étalage de leur talent et Marie-Philip Poulin a...
ici.radio-canada.ca
Context: discussion on the Red Wings and the podcast team being impressed with how they've built their leadership core.
"Je ne sais pas si Claude Giroux va pouvoir aider ça... semble-t-il qu'il y a un problème avec le leadership chez les Sénateurs. Brady Tkachuk est devenu capitaine parce qu'il a fait inscrire cette clause dans son contrat. Semble-t-il que ca n'a pas tres bien passé au pratique. On va voir, Claude Giroux arrive quand même avec de l'expérience, avec du vécu. Il a porté le C chez les Flyers, alors peut-être ca va aider un peu à changer le dynamique de groupe."
Translated:
"I don't know if Claude Giroux will be able to help this, but it seems there's a problem with the leadership with the Senators. Brady Tkachuk became captain because he had that inserted as a clause in his contract. It seems that it didn't go over very well in practice. We'll see, Claude Giroux is still coming in with lived experience, having worn the C with the Flyers. Maybe that'll help change the group dynamic."
After that the conversation shifts to Gaudreau.
Not sure your interpretation of Giroux finding out after the fact is accurate? I didn't get that from what was said. My own speculation here, but based on the context it sounds more to me like it'd be Chabot's camp who were unhappy with it, and they're hoping Giroux can right the ship.