He said nothing changed when he left. In the same sentence.
Now on side note here is what media member Andy Larsen said on Kanter right before the trade and after rumor got around that he wanted out.
"It's funny, Kanter was an incredibly happy-go-lucky guy. He was easily the nicest player to me, even when I was ripping him: he's just a fun guy! But then, after games, especially losses, you could just see that it was eating him up that he wasn't getting more of a chance to contribute. He was making very thinly veiled comments about Ty's coaching and rotations. He clearly thought that this year would be a new beginning, but when a second coach limited him too (due to his defense), he wanted out. But yeah, he was unhappy about his situation at least going back to year 2."