I don't think Real Madrid is in a good situation right now, they nearly lost the La Liga title to Barcelona and there is o hope for them anymore and this can have a negative effect on the team, however, they have enough time to recover. On the other hand, Bayern Munich started working with a new coach and we can't be sure how they are going to perform even in Bundesliga also he needs some time with his team. While Napoli got a more stable situation.
I don't see league performance and Champions League performance in the same way. Real Madrid always do well in the Champions League. Although they are on the verge of losing the league title but I believe Real Madrid will surprise again in the Champions League. Moreover, Bayern Munich and Manchester City are far ahead in the race to win the Champions League.
you are right Despite performing poorly in the league, there are many teams who are capable of performing well in the Champions League. We have seen Chelsea's performance in 2020-21. Chelsea's performance in the Premier League was very poor. But this team has managed to win the Champions League title. Real Madrid and Manchester City are not at the top of their respective leagues, but they are doing well in the Champions League. However, it is not possible to predict which team will win the title this season. Several teams are favorites to win this year's title. I look forward to seeing the four teams qualify for the semi-finals.
I agree with this, every competition they play gets different results, we can't assume it's all the same although we definitely consider this with what they do in the domestic league. There are good teams in the domestic league, but they failed in the Champions League. Like Barcelona for example, this season they are very good in La Liga but they can't do much in the Champions League even in the Europa League. So each competition can produce very different results for each team.
A good performance in the domestic league does not guarantee success in the Champions League. While PSG and Barcelona dominate the domestic league, they do not fare well in the Champions League. On the other hand, none of Manchester City, Real Madrid, Bayern Munich, Inter Milan or Chelsea is in the top position in the domestic league. Among the Champions League teams, Napoli and Benfica teams have been able to continue to perform consistently well in the domestic league and the Champions League. Besides, the performance of other teams is not as good as expected in the domestic league. But there is no surprise if Benfica or Napoli are championing this season. These two teams have proved their worth in this year's Champions League.