Turan was signed by the La Liga champions on a five-year deal from Atletico Madrid but will be unable to play until January due to the FIFA transfer ban which restricts Barcelona from registering new players.
Uygun stated that Turan should have joined Premier League giants Manchester United instead of the reigning Champions League title holders.
The experienced manager told the Radikal newspaper: “I do not see him playing much and he is out of action for six-months anyway so it was a bad choice. He should have joined Manchester United.”
Turan was closely linked with a move to England over the summer after his agent Ahmet Bulut confirmed that he is in talks with three Premier League clubs.
“I’m in discussion with three clubs, but I can’t reveal their names, they are three of the best clubs in England and indeed in Europe,” he told AS.
United were reported to have put forward an offer according to Gazzetta dello Sport however, Turan ended up staying in Spain joining Atleti’s rivals on a deal worth close to €40 million.
Turan has yet to play for Barcelona but he did star in the Turkish national team’s 3-0 victory over the Netherlands in the Euro 2016 Group A qualification game.