Juventus may be without cups this season. Experienced, but rather aged players cannot compete with other younger players for a long time. Inter in Serie A, Bayern Munich, Atletico Madrid, Liverpool in the Champions League play faster and more aggressive football. Juventus has very little chance against these teams.
Aged players? The Starting XI of Juventus has 2 over 30 players.
We have a younger team than Real, Barca, or Bayern.
Starting line-up for the last match in the Champions League:
Buffon -42,Bonucci - 33,Ronaldo - 35,Cuadrado - 32. And Alex Sandro,Danilo and Ramsey - 29.
In the current Champions League, the youngest team is RB Leipzig (23,8), the elderly Juventus (28).
https://www.transfermarkt.co.uk/uefa-champions-league/teilnehmer/pokalwettbewerb/CLLol it all depends on who you play as well. Juventus had very young defenders too, but older defenders too, young(er) goalkeeper too, and buffon too. Basically it all depends on the eleven you put on the field, and most teams could put out a very young or a very old team if they want to.
Champions league has a limit, so you can't just bring all the players you have, in the league you can register almost everyone barring some age restriction if they are too young, but aside from that you could play with 11 players that are 19 years old or younger in the league, all depends on if you ever want to do that, or you can play with 11 players over 28 as well if you have them. I think Juventus is a bit on the older side versus some of the other teams but their main problem is not age, it is more about their system is not fit for Europe, Italian clubs never really had that great offense, usually hard defense, and when hard defense is booked, they just lose.