Bonucci went from being regarded as the best CB in the world to a forgotten joke.
When you're a defender, your team determines who you are. It's impossible to shine as a defender if you don't have a good team. There is a reason why guys like Sergio Ramos and others don't leave their winning teams.
It would be like Lewis Hamilton leaving the best team in Formula 1 to race for a shitty team. I bet nobody would call him the best driver after that.
#ShittierThanEver