Exactly, Pogba was here for 4 years and only minor issue was coming to training late once. Otherwise he was a professional doing his job (Pogba despite the celeb fluff has never been trouble maker)because the club hierarchy does not allow for any hint of BS.
See what we did with Vidal, Caceres after car wrecking accidents, same with Costa these days. You get scolded and if you dint listen you become persona non grata.
Take out the serious organisation that holds you in check and you get to indulge with player power hubris. Man U is basically a walking reality show because they directly encourage their mercenary players to focus on their off the pitch brands, and it takes focus off what matters and leads to unserious supbar product.
Chelsea been directly undermining their coaches for 7 years, players can behave in one successful season but at first sign of trouble coaches have no authority. Because circus management given all the leverage to entitled players to completely ignore or work against their coach.