The Spaniard was relieved of his duties in November last year after a run of seven games in all competitions without a win, with the Gunners eight points adrift of the Premier League's top four.
Everyone accused him of being a bad head coach. It's true that he wasn't able to motivate his players and even that he didn't choose the right tactics for the team.
On the other hand, Emery tried to defend himself.
Emery told France Football: "Arsenal was a club on a downward slope for two years before I arrived. We stopped this fall and even began to rebuild the club with the Europa League final and fifth place in the league, only one point off Tottenham despite the fact that we took just one point in our final five matches.
"We had Champions League qualification in our grasp and it went wrong in the end. But it was a good season and we had this notion of continuing to improve.
"But we lost our four captains: [Laurent] Koscielny, [Petr] Cech, [Aaron] Ramsey and [Nacho] Monreal. They were personalities that we missed this season to stay on the right track, and some stars did not have a good attitude and asked for more than what they were giving back.
"Taking all of that into account, we needed time to succeed with our transition to a new Arsenal, which is what I wanted."
The team seems to be much more happier under the management of Mikel Arteta.
It's just a matter of time to see back Arsenal that we all know very well.