The Romanian, who was sacked by Chelsea for testing positive for cocaine in 2004, accused the Blues boss of only knowing of negative ways to draw a reaction from players.
Jose Mourinho is "fake" and "finished" as a coach, according to former Chelsea player Adrian Mutu.
The Romanian, who currently plays for Pune City in the Indian Super League, endured a difficult relationship with Mourinho during their brief spell together at Stamford Bridge in 2004 which culminated in Mutu being sacked after testing positive for cocaine.
The 36-year-old accused the Chelsea manager of lacking man management skills and taking a negative approach to drawing a reaction from his players during periods of poor form.