Weah rejected a move to Nottingham Forest earlier this month - which was set up by Comolli.
Weah's agent, Badou Sambague, slammed Comolli at the time and has launched a new broadside as a move to Olympique Marseille now stalls.
Weah has accepted a contract offer from OM, but Juve's current asking price is proving too steep for the French giants.
Sambague has now released a new statement, saying: "Juve is a fantastic club. The sporting department is run by three people. Two have class, and another is still finding his feet. We can't blame him.
"Two are looking for solutions, and one is creating problems. And we can't afford that. Tim Weah has always been professional, even during the World Cup. This person ruined his World Cup, trying to force him to go where he wanted (Nottingham Forest). Today, out of revenge, he's demanding a fortune and waiting for an offer from the Premier League that won't arrive and will never be approved by us.
"These are outdated methods that I can't stomach. I'm not used to speaking out, but not doing so today would be tantamount to accepting an unacceptable and total lack of respect. Class can't be bought for a coach, that's for sure, but it's always been part of Juventus' history. One person is undermining it. Let's see."