Ally McCoist has now admitted how baffled he was by something Leandro Trossard did in the 92nd minute for Arsenal last night. Despite going toe-to-toe with Bayern Munich over the two legs, Mikel Arteta ultimately watched his side come up short. Whether it was down to Champions League experience or the lack of a ruthless goalscorer up top, Arsenal eventually deserved to bow out of the competition – beaten by a better rounded side. Of course, it’s difficult to accept that reality in a season in which Bayern have been so poor domestically, and Thomas Tuchel is set to be let go. Arsenal are suppos…