I do not think Real Madrid will have easy time in Champions League with their current team. They have history of doing well in tournament but last year they got lucky because of mistakes made by other teams. They also won some games at very last minute. Other teams like Bayern Munich could have won if they made different decisions. This means Real Madrid did not just win because they were best but also because of things outside of their control. So I think they will face problems in Champions League with their current team.
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If a team wins trophies multiple times, then I think it's better to acknowledge the greatness and good quality that they have. Unless, for example, Real Madrid only managed to win the trophy once then it's appropriate to say things like the team, about the other team making mistakes that made Real Madrid win. Because Real Madrid are the most successful team in the Champions League, so of course there will always be tension in the match so the opposing team also makes mistakes and that's normal.
After all, if the opposing team is the best team compared to Real Madrid, then the opposing team you are referring to should not make mistakes. So, just because the team you're referring to made some mistakes,it's not the best team and the winning team and the trophy-winning team is clearly the best team, so just acknowledge the impressive quality that Real Madrid has. But indeed,for this season, although Real Madrid has the best young squad, but it is also still not a guarantee for Real Madrid to get the Champions League trophy this season.