Garth Crooks believes the ‘trolls’ who ‘wrote off’ an Arsenal star now look ‘foolish’ as he has proved any doubters wrong to emerge as a leading figure at Emirates Stadium. The Gunners enjoyed by large a successful season but fell narrowly short in their quest to lift a title. Mikel Arteta saw Arsenal miss out on lifting their first Premier League title in 20 years by just two points. He also led the north Londoners to the Champions League quarter-finals. A 3-2 loss on aggregate to Bayern Munich saw Arsenal bow out of Europe after reaching the last eight of the UEFA competition for the first t…