The main aim of signing Ronaldo for Juventus was clearly to win the Champions league, which they didn’t achieve. I see this as the main reason why people claim Ronaldo wasn’t a good signing for Juventus. As well as him being one of the main reasons for Juventus’ economic issues.
Oh but they didn’t had a middlefield" of course they didn’t, they spent 100m on an elder, instead going for players they actually needed.
Juventus probably had enough money at the time to sign better players than Ramsey on a free. Your board could have improved the midfield at the same time of signing Ronaldo.