Obviously a fault of Arsene Wenger rather than the German’s own, but it causes Ozil an issue either way.
He is a number ten. That is his best and only position and frankly, if he is not played there, you may as well not play him at all.
Ozil needs to make this clear to his manager and not sulk on the sidelines or go missing in games.
He came to the club to be a playmaker and needs to be firm enough about that to ensure it happens.