The thing about Arsene that was always very frustrating is that his failures were never straight-up failures, and felt to a great extent self-inflicted.
Over the years he has shown himself to be incredibly competent, but also has a tendency to handicap his teams in the most puzzling of ways.
This year has been no different. At home we are basically the best team in England. Away we are in danger of relegation. What the actual fuck?! This is not normal.
Only two years ago we finished above Man City, Tottenham, manU, Chelsea, and everyone else, but below Leicester(!).
The year we finally fell out of the top 4 we also won the FA Cup against the Champions.
The saddest thing about the late Wenger years won't be the lack of trophies, our league position, etc. but that the club as a whole were unable to let him work his magic while steering him away from making the same mistakes over and over.
Perhaps it was not possible, perhaps his strong stubborn personality would not allow it, but it would have been wonderful to see and it's sad to know for certain that it will never happen.