The fact that he is so bad and he's getting chances makes me think there's something going on with his life, as in it's not for lack of effort, football aside i hope this guy is alright.
I think that's a good question. It's odd because he hit poor form for a while, then he was played as pseudo sort of a striker and was absolutely horrific and he has never been the same since. Like that period was so bad it killed any confidence he had in himself.
It has to be mental because he is ok for Italy. Not great by any means but nowhere near the disaster he is for Juve.