What we failed to achieve with Ronaldo is score more goals as a team. I am looking at Real's La Liga stats from the last 3 seasons where they scored 63, 70, and 65 goals respectively (without Ronaldo), while in the last 3 seasons with Ronaldo their numbers were: 94, 106, 110. It's clear that the other Real players are scoring as much as before, but they are missing Ronaldo's 30-40 goals per season (Real are scoring 37 goals less on average after Ronaldo left them).
With us, though, almost as if nothing has changed. In the three pre-Ronaldo seasons we scored: 86, 77, 75 goals in serie A, while with Ronaldo the numbers are: 73, 76, 70. It's almost the same, and slightly worse (on average we are scoring 6 goals less per season with Ronaldo, compared to the seasons before he joined).
Even in the striking department, the numbers are more or less the same. The strikers in 2019-2021 are scoring: 42, 50, 41, while before Ronaldo it was: 43, 43, 41.
As if nothing has changed, except that Ronaldo alone is now scoring the goals that previously were being scored by Higuain+Mandzukic, or Dybala+Mandzukic. But we failed to add Ronaldo's goals to what we already had.