No problem with anyone "being a maverick" if they put the work in & their output is decent.
But look at Mousset's career to see a picture of a young man unable, or unwilling to get himself fit enough to regularly play 90 minutes of football.
In fact, I don't think he played a full game for us once last season.
There seems to be a theory that a lot subscribe to that you can't judge a person by the content of their social media, but he posts - almost daily - with insights into his personal life. Why would this be completely ignored? Nobody is suggesting it gives the full picture, but it tells something...
Nobody is judging him on his social media in isolation, nor on his "owning an orange lamborghini."
But when you start adding in all of the bits & pieces; the on-field evidence (unable to get fit, oft strolling around the pitch, unable to speak the language), the off-field rumours (rifts with management, dietary issues etc), the social media posts (displays of wealth, laid back persona, always with French mates acting like he's in rap videos) then you can start to form a picture.
Others can & will interpret things differently, that's fine. I hope you guys are right & he turns things around and becomes the player we all know he can be (October/November Mousset).
Sadly, I think there is more to suggest he will struggle for fitness again next season and probably be shipped out next Summer.