I can't imagine he said this if there hadn't already been a conversation with Amorim and club officials about his future which included him expressing a desire to leave and the club agreeing it's for the best. At this point I wouldn't blame him, and I don't blame the club for wanting to try and move him on either.
It's fair to criticise his performances, sure, but some people seem to take it to another level and are critical of him personally. And I don't doubt he does gets full on abuse from segments of the fanbase. Considering some of the criticisms are he is dumb as a box of rocks and some are that he seems to be some Machiavellian PR manipulator a lot of it reads like people are acting on a lack of information, and drawing their own conclusions.
Nothing about what he said reads as vindictive or harmful. He's talking about his future, and what's best for him.
His performances on the field haven't been good enough, but I'll still be sad when he goes.