#3. Injuries-
Injuries and struggle for top 4 have been the only constants for Arsenal in the past 20 years. Losing big players at crucial junctures had been a problem Wenger throughout the years and Unai is no different. Welbeck, Holding, Bellerin, Sokratis, and Monreal have been injured for various duration of time this season. The absence of these experienced players has affected Arsenal's hopes of reaching top four.
Besides the lack of funds, the workload management of the existing players had always been poor at Arsenal. It is something Emery will have to address in the coming seasons. It’s important to keep players fit for the crucial part of the season, especially for the last 2-3 months of the season where Arsenal usually lose their form and succumb to pressure.
Yet, at present, Emery is trying his best to keep the club in the hunt for the top four finish, and his expertise in the Europa League will give a glimmer of hope of a return to the Champions League next season. Injuries cannot be avoided, but the manager would have to pick a squad which can be resilient to such devastating injuries.
As much as Emery is putting in his best, the players also have to believe in their manager or else, history would repeat itself. There would not be any difference between Wenger and Emery if these problems do not get solved.