I thought one problem that people criticise Wenger for is that he doesn't tell the players how to play or dictate tactics.
Doesn't he just let them go out there and do their thing? Which was great when we had people like Bergkamp and Henry, you don't really need tactics when you've got players like that around, but now we're suddenly faced with 3 or 4 squads at least as good if not better than ours and that's where Wenger falls down.