Gerald Cid has criticised Bolton’s low-key training regime and claimed it was a major reason for quitting the club.
Cid returned to France last week with Nice after making just 14 appearances for Bolton following a summer move from Bordeaux.
The 24-year-old has declared his time with the Trotters was “a disappointment”.
Speaking to L’Equipe, he added: “Some people have told me that I was mad to leave.
“But I could not see myself remaining on the bench or playing on the left for several more months.
“As soon as I knew the door was open to go I did not need to give it much thought.”
Cid believes he had no chance of improving his game with Bolton and said: “I feel as though I worked less during training sessions than I ever did in France.
“We kept all of our energy for the matches. We would have a long warm-up, small games, but often every day was the same.
“To me training sessions are important if you want to improve, and that was not going to happen.”