Champion's League is hard to win, you need a combination of luck and skill to win it.
For example on final this year we got Liverpool and Spurs but they pass the group stage for incredible luck both.
Also for example, in this case, we talk about Juve, if the shot of Douglas Costa vs ajax instead of taking the pole and going outside he took the pole and score, we probably now talking about a different story.
You need l think 70% skill and 30% luck to win the cup.
5 minutes at the end and just needed only 5 centimeters more on left to change the history, a bit of luck.
https://www.youtube.com/watch?v=ivFyZ3SoIfQLike what Pep Guardiola said recent weeks (that I agreed with), to win Champions League, a club has to show their strength, stable performaces (at highs), and also need luck to win that title. I agreed both with you and Pep. Sometimes, personal excellent strikes or terrible mistakes (from players, even key-players or super stars; or referees) change match results entirely. It is hard to deny strength of clubs that reserve their place in Semi-Final matches, but yeah at this round, every clubs deserve to win, almost equally in my opinion.
Juventus and Manchester City are strong, really strong teams, but they defeated recent years, in Champions League, due to their own players' mistakes, referess, or due to their opponents' unbelivably excellent moments.
Teams can win in their national leagues, that last for month, and minor mistakes can not seriously change ends of leagues, because strong teams always have chances to fix their mistakes and come back; that they never have in Champions League.