Journalist Kaya Kaynak has now identified the main issue causing one Arsenal star to struggle to find his best form at the moment. Arsenal were far from their best as they lost 2-0 to Aston Villa at the Emirates Stadium on Sunday. Mikel Arteta made some changes to his starting XI ahead of this Premier League clash. Leandro Trossard, Gabriel Jesus, and Oleksandr Zinchenko were named in the team with Gabriel Martinelli, Jorginho, and Jakub Kiwior all dropping to the bench. None of this incoming trio were able to cover themselves in glory with their performances against the Midlands outfit. Tross…