I am not Poch out or whatever but that is a pretty poor line of argumentation.
Was Wenger a failure in his years at Woolwich? No sadly not but the past 10 years were dog shit and I think they really serve as a cautionary tale of what happens when you blindly stay loyal to underperforming managers who are not only failing to win trophies but are also spreading negativity around the club.
Sometimes managers, like players, just lose the hunger, skill, passion. I think Poch needs to change soon or I doubt he'll be here next year - either he will resign or he will be fired - unless he can mentally turn it around.