"The story is simple. Middlesbrough are going to pay the 5million euros asked for by Paris St Germain," he told L'Equipe. "Normally, a transfer is paid in two instalments - so Middlesbrough pay 2.5million euros now and the other half later.
"But Paris need liquid assets. Paris want the 5million euros immediately.
"So I am irritated. It has taken too long. I am trying to meet up with the board but they aren't daring to make a decision.
"Quite simply, they are all incompetent."
He also launched a verbal volley at new PSG president Charles Villeneuve, adding: "When I think that he has even refused to meet the Middlesbrough chairman, who came over especially to sort this problem out.
"Mr. Villeneuve prefers to send someone else to talk. I am going mad. This club is doing my head in. I can't stay."