He is the new Man Utd fan scapegoat, that's it. We always need to have one for some reason.
He is simply being harshly judged on, similarly to so many flair players we had before, including Ronaldo.
For now, I can see that, at a minimum, our team is better(more balanced is the more precise word) when Antony plays.
He seems to be tactically sufficient, has a good workrate and you can see glimpses of his technicality and physicality which can only be more evident when he grows on the team and league. He also has grit and arrogance which are usually good signs to succeed at our club.
Just give him time, and reserve your judgement to when the kid has a proper stretch of games, and is fully settled in the club, and please dont turn this into another Sancho situation.