He was never meant to be our game changer, we have way too much talent in this squad for that to ever be the case.
You are again holding the money we paid for him over his head, he can't help that was his cost.
The comparisons are simply related to needing a season to get with the squad. Especially for him, he doesn't play as a winger like this at Villa, he will need the time. He also seems like he might even be better suited as a midfielder as well.
Just give it time for him and Pep to figure it out. Stop caring about the "record signing" part, it's not your money ffs.