Neymar shockingly joined the Ligue 1 champions from Barcelona in 2017, after the Parisians matched his €222m buyout clause.
The Brazil international unsuccessfully tried to engineer a move away from the Parc des Princes this summer after just two seasons, with Barcelona and Real Madrid reportedly interested.
Paris Saint-Germain head coach Thomas Tuchel recently criticized Neymar for attending the Davis Cup final in Madrid.
Petit insists Neymar plays for himself and that was not the case for him during his career when he played with superstars like Zinedine Zidane and Youri Djorkaeff.
'When I played with Zidane or Djorkaeff, I knew they were able to decide a game on their own, so we accepted their defensive neglect,' the 49-year-old told RMC Sport.
'We accepted it and did our job because we knew they could win with a flash of genius.
'This is not the case, at all, with Neymar. This guy plays for him, and only for him.’
'Put yourself in the place of the boys in the place of the PSG dressing room, who live for months with the whims of this guy who s**** on the club and their supporters; he has no respect.'
The 27-year-old has scored four goals in seven matches for the Parisians so far this season, but received a hostile reception when he returned from injury in Paris Saint-Germain’s 2-0 win over Lille last week.