"Sorry, but the people on the board have destroyed this club. That's what you have to face. How do you rebuild that? I don't know, it's going to take a long time," he told ESPN.
"I've talked about it a lot and I'm fed up repeating myself... as long as you don't have people to rely on, meaning experienced players, you can't build anything. This is what you face when you're trying to build an Academy team.
"The Chelsea players have no stamina, nothing in their heart, nothing in their brain, they don't know what to do,' he added.
"It's unprofessional and unfair to the people who love this club. I'm fed up. 10-men Burnley should have won the game. Chelsea Football Club against Burnley... that's the end of it.
"I want to congratulate the fans for still being able to go to Stamford Bridge to watch that."