Yes, Barcelona is very fortunate to have a great coach like Hansi Flick. As we all know, Hansi Flick arrived at Barcelona when the club was in a difficult situation, both financially and in terms of performance. But Hansi Flick continued to work wholeheartedly at Barcelona, even with players who were initially mediocre. However, after being coached by Hansi Flick, those players who initially seemed mediocre actually performed much better. The proof is that last season, Barcelona immediately won La Liga again and also won two other domestic trophies. Barcelona's achievements are certainly thanks to a great coach like Hansi Flick. In fact, Barcelona was so great the previous season that Real Madrid were consistently defeated by them in every match.
Hansi Flick as improve Barcelona performance as achieve great trophy and am sure that he is the best coach for Barcelona currently and he as many trophies to win next season because they are in a better condition currently. Which how real madrid are playing currently if new season start am believe that Barcelona will still have more opportunities to defeat Real Madrid in the league competition, expect xabi Alonso change is statistics and the players adapt in the tactics in the pitch. And he need to make it fast before the season start. And madrid still need defender because Rudiger is getting old and they have started performing weak in the pitch, they need to look for young players that have more experience then Rudiger in the pitch.
Furthermore, speaking of Real Madrid, you're right. Real Madrid can't continue to rely on their aging defenders. Their performance is certain to decline and they are also prone to injury. Therefore, Real Madrid must bring in new defenders to strengthen their defense and improve. However, after I investigated, Real Madrid has actually brought in three new defenders: Dean Huijsen, Alvaro Carreras, and Alexander Arnold. All three players are quite formidable defenders. So Real Madrid should be able to strengthen their defense even more with these three new players.