I think the big trouble for Wenger is that he can't handle/manage big characters, look at Jens Lehman, he was a great GK and a very strong voice who would yell at the team when required, he was replaced far too soon by the meek and vastly inferior Almunia. We also let Keown, Adams, Bould, Viera, Petit, Henry etc leave to be replaced by inferior players.
I can't see a single leader aside from Cech, we need somebody to grab the players and to shake them up a bit.
After the Man U game Wenger should've given Bould 20 minutes to go in there and tear them apart.
The Board just want the profit so there is no pressure on Wenger and as such no pressure on the players, if we'd bought Higuain, Carvallho etc the pressure and expectation would have been on Wenger.