Allegri was a proven winner and a history of overperforming in the CL. FFS.
I dont think we overperformed in any season..
2015 final - I think we were very strong and 2015 team was probably my favorite of this decade
2016 - We put in a performance but got eliminated by Bayern after Morata`s goal incorrectly disallowed - I think we were on par with Bayern so still not overperforming..
2017 final - Before the game vs Real not many would think of a 4-1 scoreline and we rightly reached the final
2018 - We did overperform against Real in the away game but we also underperformed in the home one..
2019 - We underperformed in every game but our game vs Valencia (the first one) and the one in the return game vs Atletico
Juve are a strong team so I wouldnt call reaching a final a definite overperform..
Liverpool overperformed last season but I dont think they overperformed this year (maybe in the league but not in CL.. I predicted a Liverpool Juve final and was only wrong with the Juve side)