Robson says good players have gone backwards joining Wenger's Arsenal.
He told talkSPORT: "He's got a reputation for developing players. Maybe he did that six, seven years ago. He's actually putting players backwards now.
"I've seen Gervinho play for the Ivory Coast before he came to Arsenal, he was a good player. I saw [Andrey] Arshavin play for Russia and Zenit St Petersburg, he was a good player. I've seen [Aaron] Ramsey play for the Welsh Under-21s, he's a good player.
"Arsene Wenger is not doing enough on the training field. He's not coaching the players, they have got no game strategy and, because he won't let anyone else do it, Arsenal are going backwards and some of their players are going backwards."