Arsenal fans have criticised Alexandre Lacazette after footage showed the Frenchman making mistakes in the clash with Brentford.The Gunners are gearing up for the return of the Premier League and welcomed the Bees to the Emirates for a friendly.The Championship outfit shocked their hosts with a 3-2 victory, though Arsenal fans were more focused on the form of their players rather than the result.Lacazette had put Arsenal 2-1 ahead though had horrendously skied an earlier chance, when leading 2-1, and was at fault for Brentford’s second goal.And fans were quick to respond to the clips with one posting on social media: “I can’t believe we finally splashed out on a striker after all those years and we ended up with that…”While another noted of.