"As I have just found out, loyalty is hard to come by nowadays. I've always tried to remain positive from week to week that there's maybe a chance to get back in the squad soon again. That's why I kept silent so far."
Arsenal manager Mikel Arteta initially made Ozil a mainstay of the team after being hired at the end of last year.
Arteta said Wednesday he has failed to get the best out of the player and therefore is willing to shoulder the blame, adding that only football reasons have been taken into account.
"My conscience is very calm because I have been really fair with him," Arteta said. "My level of communication with him has been really high and we know what to expect with each other.
"Obviously a player of that dimension, with the career he has had, everything that happens around him has a big impact. It has been the case for the last eight years, it is nothing new that is just happening now. ... My job is to get the best out of every player, to contribute to the team performance. Here I feel at the moment, today, that I have failed."
Ozil is in the final year of his contract at Arsenal, which he joined in 2013 from Real Madrid.