Football at the top level has evolved in the last couple of years, where the best teams expect ALL the midfielders to put in a huge shift closing down the opposition as well as showing their own skills. Ozil has never been able to do the former.
Even worse, £350,000 per week (£18.2m per annum).
https://www.telegraph.co.uk/football/2018/01/31/mesut-ozil-signs-new-350000-a-week-deal-become-arsenals-highest/