To be honest, Wenger started a side that was surely going to fail. He did not intend on winning this game, but just wanted to hopefully draw or limit the damage. Everyone knows we would attack all day if we spread them, but he had no interest. Whether it is because he is focused on the PL or not is debatable.
His transfer philosophy is the only thing that hurts him at this point. Everyone is getting hot about him not starting the Ox, but the main thing is he doesn't want to overplay him like he did Wilshere last season. The last thing we need at this point are more injuries, and the likelihood that we would actually win the CL are slim-to-none anyways.
I think Wenger should stay, but the owner needs to grow a pair and force some moves. Djourou needs to play in the Swiss league, at best. Gibbs is a back up, at best. Song only shows up half of the time because he has no real competition (insert M'Vila), and given that Van Persie WILL leave this summer you have to move for Benzema or someone of equal value.