Arsene Wenger's reign as Arsenal boss is being backed by a deteriorating list of supporters.The Frenchman's 21-and-a-half-year career in north London has contrasted somewhat from the glory days of past to the now near mediocrity that infests the Emirates today.Gunners fans now reminisce about the days of Thierry Henry, Dennis Bergkamp and co, the Invincibles and their run to the Champions League final against Barcelona in 2006.Arsenal may have won two of the previous three FA Cup finals, but it's not something that resonates so well with the club's diehard fanbase when talked about in the context of the last decade.Liverpool and Tottenham are fellow top six sides which have failed to win major silverware consistently in recent years, but it's perhaps their positive progress that angers Gooners the most.Under Wenger, the north Londoners appear to be in a slow and painful decline, despite stakeholders who have the financial backbone to catapult them to title-challenging status.Nonetheless, regardless of who is ultimately to blame, it's been made clear - not just by Arsenal fans, but fellow football supporters too - that Wenger should either step down or be forced to do so.

Arsenal destined not to reach top four

Asides from the odd good performance - often a sign of false hope - Wenger has failed to help Arsenal produce the performances and results which even suggest they can finish in the top four.

Their current position of sixth and an astonishing 30 points short of league leaders Manchester City - 13 points shy of fourth-placed local rivals Tottenham - is clear evidence of the club's decline.

And their abysmal display in their 3-0 League Cup final loss to City was only made more depressing by a loss of the same scoreline to the same opponents just days later on their own turf.

Fans can rightly be branded pessimistic at times, but there's an overwhelming feeling that Arsenal supporters have every right to feel the way they do about their club's current predicament.

Ferdinand mocks Wenger at his own expense

And when a pundit and former professional of the highest level supports Arsenal fans' cries for Wenger to be sacked, it's probably fair to say they've got a valid point.

That's exactly what happened on Sunday, ahead of Arsenal's trip to face Brighton, when former Manchester United defender Rio Ferdinand humorously mocked Wenger on Twitter.

Ferdinand's final couple of years of his career may have petered out in the Championship, but he did at least win in the past decade with United than Wenger has at Arsenal.

Whether Wenger leaves in the summer or at the end of his contract the following season remains to be seen, but it simply has to be inevitable that this is Wenger's last contract at the Emirates.