Seems to me all he's done wrong is that he's been too effective and not played Wengerball by not passing it sideways and backwards when it makes more sense to be more direct and run with the ball.
We all know Wenger has his favourites, he has from the day he arrives and they get a free pass into the team whatever the circumstances, in the past we could put up with that as the players who were his favourites were very good, now though half of them are dogshite and shouldn't be anywhere near this club.
If it was me I'd have a massive clearout and get rid of the all of the crocks, they can't be relied on and we shouldn't have to rely on them and waste money we could pay to players who actually can play most of a season.
Wenger seems intent on holding onto the crocks though, even after 4-5 years of injuries he still persists, believing that one day if some miracle occurs they'll stay fit and be like new signings, delusional doesn't even begin to explain it.