It doesn't matter that they lost against Real Madrid, with their current squad they are not a team that can be compared to Real Madrid. Since Real Madrid is a much superior team to them, they managed to dominate the match.
I still think they are promising in terms of their playing style. If they continue to build a good squad, they can be very successful next season. I am curious to watch them in Serie A

They also replaced some of the older players that caused this bad period since their last championship, or on sale, and the yare using newer, younger, better players who are hungry. Like Kenan Yildiz never saw a title with Juventus, he was too young, so he is not as complacent as some of the older players, that's the point in getting better, get players who are hungry for a title.
When you win 10+ times in a row, the team doesn't have that hunger, from the kit manager to owner, nobody feels that hunger, so you need to make changes, and get players who are more ambitious about it. This team looks like they are on the right track, they just need to find a way to get rid of some of the excess players, but then they should be fine.